CVE-2026-53437

Jenkins 2.567 and earlier, LTS 2.555.2 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains tab or newline characters between `//`, allowing attackers to perform phishing attacks.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.jenkins.io/security/advisory/2026-06-10/#SECURITY-3711+3755	Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:60239
https://access.redhat.com/errata/RHSA-2026:60246
https://access.redhat.com/errata/RHSA-2026:60247
https://access.redhat.com/errata/RHSA-2026:60248
https://access.redhat.com/errata/RHSA-2026:60249
https://access.redhat.com/errata/RHSA-2026:60250
https://access.redhat.com/errata/RHSA-2026:60251
https://access.redhat.com/errata/RHSA-2026:60252
https://access.redhat.com/errata/RHSA-2026:60254
https://access.redhat.com/errata/RHSA-2026:60256
https://access.redhat.com/errata/RHSA-2026:60259
https://access.redhat.com/security/cve/CVE-2026-53437
https://bugzilla.redhat.com/show_bug.cgi?id=2487544
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53437.json

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:jenkins:jenkins:::::lts:::*
	cpe:2.3:a:jenkins:jenkins:::::-:::*

History

No history.

Information

Published : 2026-06-10 14:16

Updated : 2026-08-27 13:18

NVD link : CVE-2026-53437

Mitre link : CVE-2026-53437

CVE.ORG link : CVE-2026-53437

JSON object : View

Products Affected

jenkins

jenkins

CWE

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

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[{"lang": "en", "value": "CWE-601"}]}], "descriptions": [{"lang": "en", "value": "Jenkins 2.567 and earlier, LTS 2.555.2 and earlier improperly determines that a redirect URL after login is legitimately pointing to Jenkins when it contains tab or newline characters between `//`, allowing attackers to perform phishing attacks."}], "lastModified": "2026-08-27T13:18:24.343", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "648B5148-FE3B-464A-8963-DCF7ACEF84E5", "versionEndExcluding": "2.555.3"}, {"criteria": "cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "356A970F-6576-49B6-8EBA-E9770ED190A7", "versionEndExcluding": "2.568"}], "operator": "OR"}]}], "sourceIdentifier": "jenkinsci-cert@googlegroups.com"}