CVE-2026-27099 | BDVDB-2026-315969 Detail

Jenkins ProjectJenkins

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

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

References#

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

Exploit#

No public exploit known

History#

Version 12026-02-18Record published in the CVE List.

Published

Published: 2026-02-18
Last modified: 2026-02-18

Vendor information

Vendor: Jenkins Project
Product: Jenkins

All Jenkins Project vulnerabilities

Score

8.0 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 41.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Cross-Site Scripting

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
Not stated
Fixed
0
Vulnerable
Not stated
Fixed
2.551
Vulnerable
Not stated
Fixed
2.541.2

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.0 High

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	Low
User Interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).