[HIGH] SimpleSAMLphp has Possible DoS via XPath Transform

PKSA-1fc7-xrz7-vw78 CVE-2026-49289 GHSA-5cjr-mxj5-wmrx

Affected version: <=4.20.2

Reported by:
GitHub

[HIGH] SimpleSAMLphp HTTP-Artifact TLS validator confusion allows cross-IdP authentication bypass

PKSA-yk3g-3g3t-ts6q CVE-2026-49283 GHSA-6929-8p9f-26jx

Affected version: <4.20.2|>=5.0.0,<5.0.6|>=6.0.0,<6.2.1

Reported by:
GitHub

[HIGH] The SimpleSAMLphp SAML2 library incorrectly verifies signatures for HTTP-Redirect binding

PKSA-rxdv-j1j4-96fj CVE-2025-27773 GHSA-46r4-f8gj-xg56

Affected version: <=4.16.15|>=5.0.0-alpha.1,<=5.0.0-alpha.19

Reported by:
GitHub

[MEDIUM] SimpleSAMLphp SAML2 has an XXE in parsing SAML messages

PKSA-1983-c8jn-trgm CVE-2024-52806 GHSA-pxm4-r5ph-q2m2

Affected version: <4.6.14

Reported by:
GitHub