CVE-2026-49284

Description

SimpleSAMLphp versions before 1.18.6 contain an information disclosure vulnerability. Prior to 2.4.7 and 2.5.2, SimpleSAMLphp's SAML SP ACS path does not enforce the IdP selected for an SP-initiated login when unsigned Response/InResponseTo is combined with a signed assertion lacking SubjectConfirmationData/InResponseTo, allowing a response issued by one trusted IdP to be bound to SP state created for another IdP and bypass flows that route users to a specific IdP, including deployments that set enable_unsolicited to false. This issue is fixed in versions 2.4.7 and 2.5.2.

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Produits concernés

• simplesamlphp
• Simplesamlphp simplesamlphp

Scores CVSS

Faiblesses (CWE)

• CWE-345

Références

• https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.4.7 ProductRelease Notes
• https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.5.2 ProductRelease Notes
• https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-q8r6-xj3f-wrrm Vendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories