CVE-2026-27099

Name: CVE-2026-27099
Creator: NVD / NIST
Published: 2026-02-18T15:18:43.857+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2026-27099 is a high-severity vulnerability rated 8/10 on the CVSS scale. 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.. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

0.51%

39.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Jenkins	Jenkins	>= 2.483, < 2.551
Jenkins	Jenkins	>= 2.492.1, < 2.541.2

References

https://www.jenkins.io/security/advisory/2026-02-18/#SECURITY-3669Vendor Advisory

Timeline

Published: Feb 18, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-27099?

How severe is CVE-2026-27099?

CVE-2026-27099 has a CVSS score of 8/10 (HIGH severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2026-27099?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-27099?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST