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GHSA-Q8R6-XJ3F-WRRM SimpleSAMLphp SP accepts a response from an unexpected IdP when unsigned `Response/InResponseTo` is combined with a signed assertion lacking `SubjectConfirmationData/InResponseTo`

🗓️ 02 Jul 2026 20:47:21Reported by GoogleType 
osv
 osv
🔗 osv.dev👁 3 Views

SimpleSAMLphp SP can accept responses from an unexpected IdP when unsigned InResponseTo pairs with a signed assertion lacking SubjectConfirmationData.

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02 Jul 2026 21:00Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.1
3