Phishing Vulnerability in Jenkins from CloudBees
CVE-2026-53436

4.3MEDIUM

Key Information:

Vendor

Jenkins
Status
Jenkins
Vendor
CVE Published:
10 June 2026

What is CVE-2026-53436?

A security feature in Jenkins fails to properly validate redirect URLs after user login, permitting malicious actors to redirect users to illegitimate sites using relative path segments (like ./ or ../). This vulnerability exposes users to potential phishing attacks, jeopardizing sensitive information and organizational security.

Affected Version(s)

Jenkins 2.568

Jenkins 2.568

Jenkins 2.555.3 < 2.555.*

References

https://www.jenkins.io/security/advisory/2026-06-10/#SECU...
vendor-advisory

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.