GO-2026-4947 Unexpected work during chain building in crypto/x509

During chain building, the amount of work that is done is not correctly limited when a large number of intermediate certificates are passed in VerifyOptions.Intermediates, which can lead to a denial of service. This affects both direct users of crypto/x509 and users of crypto/tls...

PT-2026-31061

Name of the Vulnerable Software and Affected Versions versions prior to 2.3 Description An issue exists in the way certificate chains are processed, specifically during chain building. The amount of work performed isn't properly limited when a large number of intermediate certificates are provide...

crypto/x509: Usage of ExtKeyUsageAny disables policy validation in crypto/x509

A flaw was found in Go's crypto/x509 package. This vulnerability allows improper certificate validation, bypassing policy constraints via using ExtKeyUsageAny in VerifyOptions.KeyUsages...

DEBIAN-CVE-2025-22874

Calling Verify with a VerifyOptions.KeyUsages that contains ExtKeyUsageAny unintentionally disabledpolicy validation. This only affected certificate chains which contain policy graphs, which are rather uncommon...

Improper Signature Verification

crypto/x509 does not properly perform certificate verification. The Certifacte.Verify ignores the requirements of provided EKUs on Windows against the VerifyOptions.KeyUsages in the verification process...