CVE-2026-48920

8.8 HIGH

Jenkins Email Extension Plugin 1933.v45cec755423f and earlier allows inlining images as `base64` in email content by setting the `data-in...

Published: 2026-05-27 · Last updated: 2026-05-28

Severity and scoring

CVSS: 8.8 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-73

Affected products

Vendor	Product
jenkins	email_extension

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-48920
[Vendor advisory]https://www.jenkins.io/security/advisory/2026-05-27/#SECURITY-3705

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