VDB
CVE-2026-49284
CVE-2026-49284
PUBLISHED
CVSS 7.1 HIGH
Reported by GitHub_M · Published July 17, 2026
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.
Risk Scores
CVSS 3.1
7.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| simplesamlphp | simplesamlphp | < 2.4.7, >= 2.5.0-rc1, < 2.5.2 |
| simplesamlphp | simplesamlphp | >= 2.5.0-rc1, < 2.5.2, >= 2.5.0-rc1, < 2.5.2, < 2.4.7 |
| simplesamlphp | simplesamlphp | 2.5.0, 0 |
Timeline
- Jul 2, 2026 CVE Published
- Jul 17, 2026 Coalition ESS Score
- Jul 18, 2026 EPSS Score
- Jul 18, 2026 Security Advisory
- Jul 20, 2026 CVE Updated
- Aug 7, 2026 EPSS Score
- Aug 24, 2026 EPSS Score
- Sep 5, 2026 EPSS Score
- Sep 12, 2026 EPSS Score
References
- https://github.com/simplesamlphp/simplesamlphp/security/advisories/GHSA-q8r6-xj3f-wrrm x_refsource_CONFIRM
- https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.4.7 x_refsource_MISC
- https://github.com/simplesamlphp/simplesamlphp/releases/tag/v2.5.2 x_refsource_MISC
- https://nvd.nist.gov/vuln/detail/CVE-2026-49284 advisory
- https://github.com/advisories/GHSA-q8r6-xj3f-wrrm advisory