high8.8
CVE-2026-48920
Jenkins Email Extension Plugin: Attackers able to control email content may specify `file:` URLs for images to read arbitrary files from Jenkins controller filesystem
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.jenkins-ci.plugins:email-ext | < 1933.1935.v276319e3cc47 | 1933.1935.v276319e3cc47 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Jenkins | Email Extension | through 1925.v1598902b_58dd Version 1933.v45cec755423f |