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CVE-2026-32281 is an algorithmic-complexity vulnerability in Go's crypto/x509 certificate-chain validation. Validation of chains using certificate policies becomes unexpectedly inefficient when certificates contain very large numbers of policy mappings, potentially causing denial of service. The vulnerability affects only otherwise trusted chains issued by a root certificate authority present in the application's VerifyOptions.Roots CertPool or the system certificate pool.
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Excessive policy mappings in certificate chains can make validation inefficient enough to cause denial of service. Only otherwise trusted chains issued by a root in VerifyOptions.Roots or the system certificate pool are affected. The vulnerability is included in the TencentOS Server 3 osbuild-composer update.
A denial-of-service vulnerability in stdlib certificate-chain validation. Excessive policy mappings can make validation unexpectedly inefficient. The flaw affects only otherwise trusted chains issued by a root CA in VerifyOptions.Roots or the system certificate pool. The advisory assigns a CVSS v3 base score of 7.5 and recommends updating stdlib and related packages to version 1.25.9 or later.
Referenced vulnerability covered by the Oracle Linux image-builder security advisory; its technical details are not provided.
A denial-of-service vulnerability in Go crypto/x509 caused by inefficient certificate-chain validation.
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Cross-references every affected SKU, including bundled OEM variants.
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