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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00044.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Jenkins Project Jenkins affected
Version Status Constraints
0 unaffected
< 2.483
2.551 unaffected
< *
2.541.2 unaffected
< 2.541.*

Configuration 1 [-]

OR cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*

No data.

Vendor Product Confidence Versions
Jenkins Project Jenkins — —

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-85h6-5m3v-gx37 Jenkins has a stored XSS vulnerability in node offline cause description
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://nvd.nist.gov/vuln/detail/CVE-2026-27099 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-27099 cve-icon
https://www.jenkins.io/security/advisory/2026-02-18/#SECURITY-3669 cve-icon cve-icon cve-icon
History

Fri, 20 Feb 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Jenkins
Jenkins jenkins
CPEs cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*
Vendors & Products Jenkins
Jenkins jenkins

Thu, 19 Feb 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Jenkins Project
Jenkins Project jenkins
Vendors & Products Jenkins Project
Jenkins Project jenkins

Thu, 19 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
Title org.jenkins-ci.main/jenkins-core: Jenkins: Stored Cross-site Scripting (XSS) via unescaped user-provided offline cause description
References

Wed, 18 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-79
Metrics cvssV3_1

{'score': 8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Wed, 18 Feb 2026 14:45:00 +0000

Type Values Removed Values Added
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.
References
cve-icon MITRE

Status: PUBLISHED

Assigner: jenkins

Published:

Updated: 2026-02-18T14:56:27.973Z

Reserved: 2026-02-17T16:48:49.373Z

Link: CVE-2026-27099

cve-icon Vulnrichment

Updated: 2026-02-18T14:54:45.810Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-18T15:18:43.857

Modified: 2026-02-20T20:52:03.000

Link: CVE-2026-27099

cve-icon Redhat

Severity :

Publid Date: 2026-02-18T14:17:43Z

Links: CVE-2026-27099 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-02-19T10:19:46Z

Weaknesses