Description
Jenkins Email Extension Plugin 1933.v45cec755423f and earlier allows inlining images as `base64` in email content by setting the `data-inline` attribute, without restrictions on the image URLs that can be inlined, allowing attackers able to control the email content to specify `file:` URLs for images to read arbitrary files from the Jenkins controller filesystem.
Published: 2026-05-27
Score: 8.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 30 May 2026 23:00:00 +0000

Type Values Removed Values Added
First Time appeared Jenkins Project
Jenkins Project jenkins Email Extension Plugin
Vendors & Products Jenkins Project
Jenkins Project jenkins Email Extension Plugin

Thu, 28 May 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Jenkins
Jenkins email Extension
CPEs cpe:2.3:a:jenkins:email_extension:*:*:*:*:*:jenkins:*:*
cpe:2.3:a:jenkins:email_extension:1933.v45cec755423f:*:*:*:*:jenkins:*:*
Vendors & Products Jenkins
Jenkins email Extension

Wed, 27 May 2026 20:15:00 +0000

Type Values Removed Values Added
Title Jenkins Email Extension Plugin Image Inlining Allows Arbitrary File Reads via File URLs

Wed, 27 May 2026 16:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-73
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 27 May 2026 15:15:00 +0000

Type Values Removed Values Added
Description Jenkins Email Extension Plugin 1933.v45cec755423f and earlier allows inlining images as `base64` in email content by setting the `data-inline` attribute, without restrictions on the image URLs that can be inlined, allowing attackers able to control the email content to specify `file:` URLs for images to read arbitrary files from the Jenkins controller filesystem.
References

Subscriptions

Jenkins Email Extension
Jenkins Project Jenkins Email Extension Plugin
cve-icon MITRE

Status: PUBLISHED

Assigner: jenkins

Published:

Updated: 2026-05-27T15:43:07.808Z

Reserved: 2026-05-26T14:50:46.813Z

Link: CVE-2026-48920

cve-icon Vulnrichment

Updated: 2026-05-27T15:43:00.473Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-27T15:16:31.647

Modified: 2026-06-17T10:55:23.903

Link: CVE-2026-48920

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-30T21:21:56Z

Weaknesses