CVE-2026-53437NVD

Vulnerability Summary

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.

Severity Level

MEDIUM(4.3)

Published Date

Jun 10, 2026

Last Modified

Aug 27, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.68%Probability

Root Weakness (CWE)

CWE-601: Unknown/Unlisted Weakness ↗

Refer to the official MITRE database for detailed architectural specifications regarding this weakness.

CVSS v3.1 Base Metrics — Score 4.3 (MEDIUM)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

ConfidentialityNone

IntegrityLow

AvailabilityNone

Affected & Patched Versions

Affected Versions

Jenkins Jenkins < 2.555.3
Jenkins Jenkins < 2.568

Patched Versions

Jenkins Jenkins 2.555.3
Jenkins Jenkins 2.568

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