CVE-2026-54779: CoreWCF: SAML token replay protection is inoperative

June 19, 2026

When enabling DetectReplayedTokens, a token can be replayed and will be detected despite it being reused.

References

github.com/CoreWCF/CoreWCF/security/advisories/GHSA-9jr3-rj99-8jq3
github.com/advisories/GHSA-9jr3-rj99-8jq3
nvd.nist.gov/vuln/detail/CVE-2026-54779

Code Behaviors & Features

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