← Vulnerability feed

Vulnerability record · CVE-2026-27099 · published 18 February 2026

CVE-2026-27099: Jenkins cross-site scripting vulnerability

Jenkins · Jenkins

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.

8.0 CVSS 3.1 High EPSS 0.57% · top 55.2% CWE-79 · Cross-site scripting
8.0CVSS 3.1 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

Track CVE-2026-27099 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2024-23897Jenkins CLI parser arbitrary file read via @ path expansionJenkins 2.441 and earlier, and LTS 2.426.2 and earlier, fails to disable a CLI command parser feature that replaces an '@' character followed by a fi…KEVEPSS 100%analysed9.8CVE-2018-1000861Jenkins Stapler framework URL routing allows remote code executionThe Stapler web framework in Jenkins 2.153 and earlier and LTS 2.138.3 and earlier lets attackers invoke unintended Java methods by requesting crafte…KEVEPSS 98%analysed9.8CVE-2017-1000353Jenkins CLI Java deserialization allows unauthenticated remote code executionJenkins 2.56 and earlier, and 2.46.1 LTS and earlier, deserialize attacker-supplied Java SignedObject data sent to the Jenkins CLI, bypassing the exi…KEVEPSS 100%analysed7.5CVE-2023-44487HTTP/2 Rapid Reset stream cancellation denial of serviceThe HTTP/2 protocol permits a client to cancel many streams quickly, and the server's handling of those resets consumes disproportionate resources. T…KEVEPSS 100%analysed7.5CVE-2015-5317Jenkins Fingerprints pages expose job and build namesJenkins before 1.638 and LTS before 1.625.2 expose sensitive job and build name information through the Fingerprints pages when requested directly. T…KEVEPSS 23%analysed9.8CVE-2021-21690Jenkins path traversal vulnerabilityAgent processes are able to completely bypass file path filtering by wrapping the file operation in an agent file path in Jenkins 2.318 and earlier, …EPSS 2.5%9.8CVE-2021-21691Jenkins link following vulnerabilityCreating symbolic links is possible without the 'symlink' agent-to-controller access control permission in Jenkins 2.318 and earlier, LTS 2.303.2 and…EPSS 2.1%9.8CVE-2021-21692Jenkins path traversal vulnerabilityFilePath#renameTo and FilePath#moveAllChildrenTo in Jenkins 2.318 and earlier, LTS 2.303.2 and earlier only check 'read' agent-to-controller access p…EPSS 2.1%

Source: NIST National Vulnerability Database (record CVE-2026-27099), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.