{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-8391", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "state": "PUBLISHED", "assignerShortName": "mozilla", "dateReserved": "2026-05-12T12:36:14.816Z", "datePublished": "2026-05-12T12:36:15.548Z", "dateUpdated": "2026-06-30T02:44:03.604Z"}, "containers": {"cna": {"affected": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "115.36", "lessThanOrEqual": "115.*", "versionType": "rpm"}, {"status": "unaffected", "version": "140.11", "lessThanOrEqual": "140.*", "versionType": "rpm"}, {"status": "unaffected", "version": "150.0.3", "lessThanOrEqual": "*", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"status": "unaffected", "version": "140.11", "lessThanOrEqual": "*", "versionType": "rpm"}]}], "descriptions": [{"lang": "en", "value": "Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11."}]}], "title": "Other issue in the JavaScript Engine component", "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2038575"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-45/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-47/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-48/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-51/"}], "credits": [{"lang": "en", "value": "ggwhyp"}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-05-19T17:10:47.079Z"}}, "adp": [{"problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-20", "lang": "en", "description": "CWE-20 Improper Input Validation"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-79", "lang": "en", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}, {"descriptions": [{"type": "CWE", "cweId": "CWE-119", "lang": "en", "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]}], "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-13T15:47:19.047188Z", "id": "CVE-2026-8391", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-13T15:47:30.418Z"}}, {"affected": [{"cpes": ["cpe:/o:redhat:rhel_els:7"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux Server (v. 7 ELS)", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux_eus:10.0"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream EUS (v. 10.0)", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:10.2"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream (v. 10)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:8::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream (v. 8)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.4::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream AUS (v.8.4)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_aus:8.6::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream AUS (v.8.6)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:8.8::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream E4S (v.8.8)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_tus:8.8::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream TUS (v.8.8)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.2::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream E4S (v.9.2)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_e4s:9.4::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream E4S (v.9.4)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:rhel_eus:9.6::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream EUS (v.9.6)", "vendor": "Red Hat"}, {"cpes": ["cpe:/a:redhat:enterprise_linux:9::appstream"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux AppStream (v. 9)", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:10"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux 10", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:6"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux 6", "vendor": "Red Hat"}, {"cpes": ["cpe:/o:redhat:enterprise_linux:7"], "defaultStatus": "affected", "product": "Red Hat Enterprise Linux 7", "vendor": "Red Hat"}], "datePublic": "2026-05-12T12:36:15.548Z", "descriptions": [{"lang": "en", "value": "A flaw was found in Firefox and Thunderbird. The Mozilla Foundation's Security Advisory describes the following issue:\nOther issue in the JavaScript Engine component"}], "metrics": [{"other": {"content": {"namespace": "https://access.redhat.com/security/updates/classification/", "value": "Important"}, "type": "Red Hat severity rating"}}, {"cvssV3_1": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "format": "CVSS"}], "problemTypes": [{"descriptions": [{"cweId": "CWE-475", "description": "Undefined Behavior for Input to API", "lang": "en", "type": "CWE"}]}], "references": [{"tags": ["vdb-entry", "x_refsource_REDHAT"], "url": "https://access.redhat.com/security/cve/CVE-2026-8391"}, {"name": "RHBZ#2476475", "tags": ["issue-tracking", "x_refsource_REDHAT"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476475"}, {"tags": ["x_sadp-csaf-vex"], "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8391.json"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26551"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:27715"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26539"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:21380"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:22325"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:21382"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:22643"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26629"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26270"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26606"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26536"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26630"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26268"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26491"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26269"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26493"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26174"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26492"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:26521"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:21378"}, {"tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2026:21381"}], "solutions": [{"lang": "en", "value": "RHSA-2026:26551: Red Hat Enterprise Linux Server (v. 7 ELS)"}, {"lang": "en", "value": "RHSA-2026:27715: Red Hat Enterprise Linux AppStream EUS (v. 10.0)"}, {"lang": "en", "value": "RHSA-2026:26539: Red Hat Enterprise Linux AppStream EUS (v. 10.0)"}, {"lang": "en", "value": "RHSA-2026:21380: Red Hat Enterprise Linux AppStream (v. 10)"}, {"lang": "en", "value": "RHSA-2026:22325: Red Hat Enterprise Linux AppStream (v. 10)"}, {"lang": "en", "value": "RHSA-2026:21382: Red Hat Enterprise Linux AppStream (v. 8)"}, {"lang": "en", "value": "RHSA-2026:22643: Red Hat Enterprise Linux AppStream (v. 8)"}, {"lang": "en", "value": "RHSA-2026:26629: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"}, {"lang": "en", "value": "RHSA-2026:26270: Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)"}, {"lang": "en", "value": "RHSA-2026:26606: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"}, {"lang": "en", "value": "RHSA-2026:26536: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)"}, {"lang": "en", "value": "RHSA-2026:26630: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"}, {"lang": "en", "value": "RHSA-2026:26268: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8)"}, {"lang": "en", "value": "RHSA-2026:26491: Red Hat Enterprise Linux AppStream E4S (v.9.2)"}, {"lang": "en", "value": "RHSA-2026:26269: Red Hat Enterprise Linux AppStream E4S (v.9.2)"}, {"lang": "en", "value": "RHSA-2026:26493: Red Hat Enterprise Linux AppStream E4S (v.9.4)"}, {"lang": "en", "value": "RHSA-2026:26174: Red Hat Enterprise Linux AppStream E4S (v.9.4)"}, {"lang": "en", "value": "RHSA-2026:26492: Red Hat Enterprise Linux AppStream EUS (v.9.6)"}, {"lang": "en", "value": "RHSA-2026:26521: Red Hat Enterprise Linux AppStream EUS (v.9.6)"}, {"lang": "en", "value": "RHSA-2026:21378: Red Hat Enterprise Linux AppStream (v. 9)"}, {"lang": "en", "value": "RHSA-2026:21381: Red Hat Enterprise Linux AppStream (v. 9)"}], "timeline": [{"lang": "en", "time": "2026-05-12T14:01:57.656Z", "value": "Reported to Red Hat."}, {"lang": "en", "time": "2026-05-12T12:36:15.548Z", "value": "Made public."}], "title": "firefox: thunderbird: Other issue in the JavaScript Engine component", "x_adpType": "supplier", "x_generator": {"engine": "sadp-cli 1.0.0"}, "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-06-30T02:44:03.604Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-8391", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-13T15:47:19.047188Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-20", "description": "CWE-20 Improper Input Validation"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-79", "description": "CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-119", "description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-13T15:47:13.828Z"}}], "cna": {"title": "Other issue in the JavaScript Engine component", "credits": [{"lang": "en", "value": "ggwhyp"}], "affected": [{"vendor": "Mozilla", "product": "Firefox", "versions": [{"status": "unaffected", "version": "115.36", "versionType": "rpm", "lessThanOrEqual": "115.*"}, {"status": "unaffected", "version": "140.11", "versionType": "rpm", "lessThanOrEqual": "140.*"}, {"status": "unaffected", "version": "150.0.3", "versionType": "rpm", "lessThanOrEqual": "*"}]}, {"vendor": "Mozilla", "product": "Thunderbird", "versions": [{"status": "unaffected", "version": "140.11", "versionType": "rpm", "lessThanOrEqual": "*"}]}], "references": [{"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2038575"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-45/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-47/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-48/"}, {"url": "https://www.mozilla.org/security/advisories/mfsa2026-51/"}], "descriptions": [{"lang": "en", "value": "Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.", "supportingMedia": [{"type": "text/html", "value": "Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.", "base64": false}]}], "providerMetadata": {"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "shortName": "mozilla", "dateUpdated": "2026-05-19T17:10:47.079Z"}}}, "cveMetadata": {"cveId": "CVE-2026-8391", "state": "PUBLISHED", "dateUpdated": "2026-05-19T17:10:47.079Z", "dateReserved": "2026-05-12T12:36:14.816Z", "assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe", "datePublished": "2026-05-12T12:36:15.548Z", "assignerShortName": "mozilla"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"product": "Firefox", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "115.*", "status": "unaffected", "version": "115.36", "versionType": "rpm"}, {"lessThanOrEqual": "140.*", "status": "unaffected", "version": "140.11", "versionType": "rpm"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "150.0.3", "versionType": "rpm"}]}, {"product": "Thunderbird", "vendor": "Mozilla", "versions": [{"lessThanOrEqual": "*", "status": "unaffected", "version": "140.11", "versionType": "rpm"}]}], "source": "security@mozilla.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*", "matchCriteriaId": "B13F359A-1C15-48B4-8319-AD42CC852E8C", "versionEndExcluding": "150.0.3", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11."}], "id": "CVE-2026-8391", "lastModified": "2026-06-17T11:03:52.867", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8391", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-05-13T15:47:19.047188Z", "version": "2.0.3"}}]}, "published": "2026-05-12T14:17:12.173", "references": [{"source": "security@mozilla.org", "tags": ["Permissions Required"], "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2038575"}, {"source": "security@mozilla.org", "tags": ["Vendor Advisory"], "url": "https://www.mozilla.org/security/advisories/mfsa2026-45/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-47/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-48/"}, {"source": "security@mozilla.org", "url": "https://www.mozilla.org/security/advisories/mfsa2026-51/"}], "sourceIdentifier": "security@mozilla.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}, {"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-119"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "firefox: Other issue in the JavaScript Engine component", "id": "2476475", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476475"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-475", "details": ["Other issue in the JavaScript Engine component. This vulnerability was fixed in Firefox 150.0.3, Firefox ESR 115.36, Firefox ESR 140.11, and Thunderbird 140.11.", "A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue:\nOther issue in the JavaScript Engine component"], "name": "CVE-2026-8391", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "rhel10/firefox-flatpak", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-12T12:36:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-8391\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-8391\nhttps://www.mozilla.org/security/advisories/mfsa2026-45/#CVE-2026-8391\nhttps://www.mozilla.org/security/advisories/mfsa2026-48/#CVE-2026-8391"], "statement": "Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[150.0.3,*]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Firefox", "source": "cna", "vendor": "Mozilla"}, "product": "firefox", "vendor": "mozilla"}], "created": "2026-05-12T14:45:17.478785+00:00", "updated": "2026-05-20T01:30:06.022054+00:00", "vendors": ["mozilla", "mozilla$PRODUCT$firefox"]}