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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Jenkins Project | Jenkins Email Extension Plugin | ≤ 1933.v45cec755423f | — |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Maven | org.jenkins-ci.plugins:email-ext | < 1933.1935.v276319e3cc47 | 1933.1935.v276319e3cc47 | GHSA-mq58-m26g-46gp |
Advisories 1
- WID-SEC-2026-1707 Jenkins Plugins: Mehrere Schwachstellen BSI CERT-Bund (WID) · May 27, 2026
References
- Jenkins Security Advisory 2026-05-27 vendor-advisory