Picketlink SP Signature Validation Flaw: Forged SAML Response Vulnerability
CVE-2026-15556 Published on August 11, 2026
Picketlink-federation: picketlink saml 2.0 auth bypass via missing assertions
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.
Vulnerability Analysis
CVE-2026-15556 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality and integrity, and no impact on availability.
Timeline
Reported to Red Hat.
Made public. 75 days later.
Weakness Type
Improper Verification of Cryptographic Signature
The software does not verify, or incorrectly verifies, the cryptographic signature for data.
Products Associated with CVE-2026-15556
Want to know whenever a new CVE is published for Red Hat products? stack.watch will email you.
Affected Versions
Red Hat JBoss Enterprise Application Platform 7.4.25: Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7:- Version 0:2.16.0-22.redhat_00057.1.el7eap and below * is unaffected.
- Version 0:2.3.14-11.SP11_redhat_00001.1.el7eap and below * is unaffected.
- Version 0:1.5.26-2.Final_redhat_00001.1.el7eap and below * is unaffected.
- Version 0:2.18.8-1.redhat_00003.1.el7eap and below * is unaffected.
- Version 0:2.18.8-1.redhat_00003.1.el7eap and below * is unaffected.
- Version 0:2.18.8-1.redhat_00003.1.el7eap and below * is unaffected.
- Version 0:2.18.8-1.redhat_00003.1.el7eap and below * is unaffected.
- Version 0:2.18.8-1.redhat_00003.1.el7eap and below * is unaffected.
- Version 0:2.18.8-1.redhat_00003.1.el7eap and below * is unaffected.
- Version 0:5.0.31-3.SP2_redhat_00001.1.el7eap and below * is unaffected.
- Version 0:1.10.0-46.Final_redhat_00044.1.el7eap and below * is unaffected.
- Version 0:4.1.135-1.Final_redhat_00001.1.el7eap and below * is unaffected.
- Version 0:4.1.135-1.Final_redhat_00001.1.el7eap and below * is unaffected.
- Version 0:2.5.5-30.SP12_redhat_00020.1.el7eap and below * is unaffected.
- Version 0:2.5.5-24.SP12_redhat_00016.1.el7eap and below * is unaffected.
- Version 0:2.2.40-2.SP3_redhat_00001.1.el7eap and below * is unaffected.
- Version 0:7.4.25-2.GA_redhat_00001.1.el7eap and below * is unaffected.