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CVE-2026-32281 Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a…

Description

Validating certificate chains which use policies is unexpectedly inefficient when certificates in the chain contain a very large number of policy mappings, possibly causing denial of service. This only affects validation of otherwise trusted certificate chains, issued by a root CA in the VerifyOptions.Roots CertPool, or in the system certificate pool.

Affected products and versions

Product Affected versions Fixed in
crypto/x509 1.26 1.26.0-0 → < 1.26.2 1.26.2
crypto/x509 1.25 earliest → < 1.25.9 1.25.9

References

Timeline

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