{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-6040", "assignerOrgId": "4fe7d05b-1353-44cc-8b7a-1e416936dff2", "state": "PUBLISHED", "assignerShortName": "Document Fdn.", "dateReserved": "2026-04-09T16:42:11.799Z", "datePublished": "2026-06-15T16:21:53.903Z", "dateUpdated": "2026-06-15T18:14:30.848Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "4fe7d05b-1353-44cc-8b7a-1e416936dff2", "shortName": "Document Fdn.", "dateUpdated": "2026-06-15T16:21:53.903Z"}, "title": "Heap use-after-free in ODF number-format blank-width parsing", "datePublic": "2026-06-15T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-416", "description": "CWE-416 Use After Free", "type": "CWE"}]}, {"descriptions": [{"lang": "en", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write", "type": "CWE"}]}], "impacts": [{"capecId": "CAPEC-44", "descriptions": [{"lang": "en", "value": "CAPEC-44 Overflow Binary Resource File"}]}], "affected": [{"vendor": "The Document Foundation", "product": "LibreOffice", "versions": [{"status": "affected", "version": "25.8", "lessThan": "< 25.8.7", "versionType": "25.8 series"}, {"status": "affected", "version": "26.2", "lessThan": "< 26.2.3", "versionType": "26.2 series"}], "defaultStatus": "unknown"}], "descriptions": [{"lang": "en", "value": "A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.</p>"}]}], "references": [{"url": "https://www.libreoffice.org/about-us/security/advisories/cve-2026-6040"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "LOCAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "LOW", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.4, "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P"}}], "credits": [{"lang": "en", "value": "Anthropic (automated discovery using Claude)", "type": "finder"}, {"lang": "en", "value": "Trail of Bits (triage and validation)", "type": "analyst"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 1.0.2"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-06-15T18:14:24.996356Z", "id": "CVE-2026-6040", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"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": "2026-06-15T18:14:30.848Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-6040", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-06-15T18:14:24.996356Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-06-15T18:14:27.632Z"}}], "cna": {"title": "Heap use-after-free in ODF number-format blank-width parsing", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Anthropic (automated discovery using Claude)"}, {"lang": "en", "type": "analyst", "value": "Trail of Bits (triage and validation)"}], "impacts": [{"capecId": "CAPEC-44", "descriptions": [{"lang": "en", "value": "CAPEC-44 Overflow Binary Resource File"}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.4, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P", "exploitMaturity": "PROOF_OF_CONCEPT", "providerUrgency": "NOT_DEFINED", "userInteraction": "PASSIVE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"vendor": "The Document Foundation", "product": "LibreOffice", "versions": [{"status": "affected", "version": "25.8", "lessThan": "< 25.8.7", "versionType": "25.8 series"}, {"status": "affected", "version": "26.2", "lessThan": "< 26.2.3", "versionType": "26.2 series"}], "defaultStatus": "unknown"}], "datePublic": "2026-06-15T00:00:00.000Z", "references": [{"url": "https://www.libreoffice.org/about-us/security/advisories/cve-2026-6040"}], "x_generator": {"engine": "Vulnogram 1.0.2"}, "descriptions": [{"lang": "en", "value": "A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.", "supportingMedia": [{"type": "text/html", "value": "<p>A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use.</p>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write"}]}], "providerMetadata": {"orgId": "4fe7d05b-1353-44cc-8b7a-1e416936dff2", "shortName": "Document Fdn.", "dateUpdated": "2026-06-15T16:21:53.903Z"}}}, "cveMetadata": {"cveId": "CVE-2026-6040", "state": "PUBLISHED", "dateUpdated": "2026-06-15T18:14:30.848Z", "dateReserved": "2026-04-09T16:42:11.799Z", "assignerOrgId": "4fe7d05b-1353-44cc-8b7a-1e416936dff2", "datePublished": "2026-06-15T16:21:53.903Z", "assignerShortName": "Document Fdn."}, "dataVersion": "5.2"}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A heap use-after-free existed when importing the blank-width characters of an ODF number format. A position value read from the document was not checked against the length of the format-code string, so a malformed number format could be processed against memory outside that string. In fixed versions the position is bounds-checked before use."}], "id": "CVE-2026-6040", "lastModified": "2026-06-15T20:55:48.070", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "PASSIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security@documentfoundation.org", "type": "Secondary"}]}, "published": "2026-06-15T18:16:36.880", "references": [{"source": "security@documentfoundation.org", "url": "https://www.libreoffice.org/about-us/security/advisories/cve-2026-6040"}], "sourceIdentifier": "security@documentfoundation.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}, {"lang": "en", "value": "CWE-787"}], "source": "security@documentfoundation.org", "type": "Secondary"}]}

{"bugzilla": {"description": "libreoffice: LibreOffice: Heap use-after-free allows arbitrary code execution via malformed ODF number format", "id": "2488966", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2488966"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A vulnerability was found in LibreOffice. If a user inadvertently opens a malicious OpenDocument Format (ODF) file, an attacker could execute unauthorized code and potentially gain full control of the system."], "mitigation": {"lang": "en:us", "value": "Users should exercise caution and avoid opening untrusted OpenDocument Format (ODF) files."}, "name": "CVE-2026-6040", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "libreoffice", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "libreoffice", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "libreoffice", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "libreoffice", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-06-15T16:21:53Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-6040\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-6040\nhttps://www.libreoffice.org/about-us/security/advisories/cve-2026-6040"], "statement": "This LibreOffice vulnerability is rated as Important. If a user inadvertently opens a maliciously crafted OpenDocument Format (ODF) file, an attacker can execute unauthorized code, potentially resulting in complete control over the affected system.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[25.8,25.8.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[26.2,26.2.3)"}}], "enrichment": {"confidence": 81.0, "confidence_source": "matching", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 81.0, "source": "matching"}]}, "original": {"product": "LibreOffice", "source": "cna", "vendor": "The Document Foundation"}, "product": "libreoffice", "vendor": "the_document_foundation"}], "created": "2026-06-16T13:45:16.287753+00:00", "updated": "2026-06-18T22:15:04.064404+00:00", "vendors": ["the_document_foundation", "the_document_foundation$PRODUCT$libreoffice"]}