SB20260528280 - External Control of File Name or Path in Jenkins Email Extension plugin
Published: May 28, 2026
Security Bulletin ID
SB20260528280
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) External Control of File Name or Path (CVE-ID: CVE-2026-48920)
CWE-ID: CWE-73 - External Control of File Name or Path
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to read arbitrary files.
The vulnerability exists due to application allows inlining images as "base64" in email content by setting the "data-inline" attribute, without restrictions on the image URLs that can be inlined. A remote user can read arbitrary files from the Jenkins controller filesystem.
Remediation
Install update from vendor's website.