SB2026021922 - Multiple vulnerabilities in Jenkins and Jenkins LTS

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Main Vulnerability Database SB2026021922

SB2026021922 - Multiple vulnerabilities in Jenkins and Jenkins LTS

Published: February 19, 2026

Security Bulletin ID SB2026021922
Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Stored cross-site scripting (CVE-ID: CVE-2026-27099)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data within the "Mark temporarily offline" offline cause. A remote user can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.


2) Information disclosure (CVE-ID: CVE-2026-27100)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the application within the Run Parameter values. A remote user can gain unauthorized access to sensitive information on the system.


Remediation

Install update from vendor's website.

References