SB2026092121 - Insufficient verification of data authenticity in Jenkins Bitbucket Server Integration plugin
Published: September 21, 2026
Security Bulletin ID
SB2026092121
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Insufficient verification of data authenticity (CVE-ID: CVE-2026-92138)
CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity
CVSSv4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.
The vulnerability exists due to the affected plugin reads the "oauth_callback" URL from the submitted form rather than from the server-side stored request token. A remote attacker can hijack the OAuth flow and obtain an access token on behalf of the victim.
Remediation
Install update from vendor's website.