Vulnerability DatabaseCVE-2026-15556
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CVE-2026-15556
Published:August 11, 2026
Updated:September 01, 2026
A flaw was found in Picketlink's SP signature validation; a SAML response containing zero assertion elements matching the signature check can allow an attacker to forge a SAML response and auth as any principal with any roles on the protected application.
Related Resources (4)
https://bugzilla.redhat.com/show_bug.cgi?id=2483121
https://access.redhat.com/errata/RHSA-2026:53644
https://access.redhat.com/security/cve/CVE-2026-15556
https://access.redhat.com/errata/RHSA-2026:53806
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CVSS v4
Base Score:
8.6
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Verification of Cryptographic Signature
CWE-347
EPSS
Base Score:
0.22