CVE-2026-27099

State: Published
Severity: 8.0 High
Published: Feb 18, 2026
Updated: Feb 18, 2026
Reserved: Feb 17, 2026

Description

Jenkins 2.483 through 2.550 (both inclusive), LTS 2.492.1 through 2.541.1 (both inclusive) does not escape the user-provided description of the "Mark temporarily offline" offline cause, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Agent/Configure or Agent/Disconnect permission.

Scores

CVSS	Score	Vector	Source
3.1	8.0 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Affected Products

Product	Versions
JenkinsJenkins Project	before 2.483Not affected 2.551 and laterNot affected 2.541.2 to before 2.541.*Not affected

References

Jenkins Security Advisory 2026-02-18vendor-advisory

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