CVE-2026-3872NVD

Vulnerability Summary

A flaw was found in Keycloak. This issue allows an attacker, who controls another path on the same web server, to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) that use a wildcard. A successful attack may lead to the theft of an access token, resulting in information disclosure.

Severity Level

HIGH(7.3)

Published Date

Apr 2, 2026

Last Modified

Jun 30, 2026

Exploitation Status

No confirmed exploitation yet

EPSS Score (30-Day)

0.44%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 7.3 (HIGH)

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

Affected & Patched Versions

Affected Versions

Redhat Build Of Keycloak

Patched Versions

Not provided by NVD for this CVE.

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