CVE-2026-27099

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.

Published: 2026-02-18 Last update: 2026-02-20 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-27099 is rated Low Risk (37.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-27099

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-03-22 0.04% 0.05% +0.01%
2 2026-02-19 — 0.04% —

Full EPSS history (2 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-27099

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.0 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.1 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2026-27099

GitHub Security Advisory for CVE-2026-27099

GHSA-85h6-5m3v-gx37 · Severity: high · Ecosystem: maven — Jenkins has a stored XSS vulnerability in node offline cause description

OS Trackers for CVE-2026-27099

vendor priority summary link
alpine — CVE-2026-27099: 1 source package rows (jenkins); 7 state rows across 2 repos (3.23-community, edge-community); fixed 0, open 7. https://security.alpinelinux.org/vuln/CVE-2026-27099
redhat medium — https://access.redhat.com/security/cve/CVE-2026-27099

Affected software / configurations for CVE-2026-27099

Vendor Product Version Raw CPE
jenkins jenkins >= 2.483, < 2.551 cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*
jenkins jenkins >= 2.492.1, < 2.541.2 cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*

References for CVE-2026-27099

cvelogic Threat Intelligence