CVE-2026-49284

7.1 highEPSS 0.2%

High (7.1) in simplesamlphp simplesamlphp. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

7.1 high

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 12% of CVEs (scores of 2026-10-31)
CWE: CWE-345
Published: 2026-07-17
Modified: 2026-07-30
Record from: the NVD, synced 2026-10-19

Affected

simplesamlphp:simplesamlphp

References

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