CVE-2026-53441Network attack vector

Stored XSS via unescaped offline cause description

Published Jun 10, 2026 · Updated Jun 10, 2026

Stored XSS in Jenkins 2.483 through 2.567 and LTS 2.492.1 through 2.555.2 allows remote authenticated users to run browser script. The POST config.xml API stores a generic node offline-cause description that the default UI renders as HTML without escaping. Agent/Configure permission is required, and execution occurs when another user views the affected UI; enforced CSP blocks it on newer affected releases.

CVSS severity5.4
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Jenkins 2.483 through 2.567 and LTS 2.492.1 through 2.555.2 allows remote authenticated users to run browser script. The POST config.xml API stores a generic node offline-cause description that the default UI renders as HTML without escaping. Agent/Configure permission is required, and execution occurs when another user views the affected UI; enforced CSP blocks it on newer affected releases.

The record

CVE
CVE-2026-53441
Published
Jun 10, 2026
Updated
Jun 10, 2026
Vendor
Jenkins Project
Product
Jenkins
Classifications
CWE-79, CAPEC-592
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Jenkins Project · JenkinsAffected versions are unavailable in this record.

Published CVSS scores

5.4NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
8.0GitHub Advisory DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-592Stored XSS

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

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