PT-2026-31061 · Go Standard Library · Crypto/X509

Published 2026-04-08 · Updated 2026-04-08 · CVE-2026-32280

Mitre

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.

Related Identifiers

CVE-2026-32280

Affected Products

Crypto/X509

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-32280 · Security Note
• https://go.dev/cl/758320 · Note
• https://pkg.go.dev/vuln/GO-2026-4947 · Note
• https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU · Note
• https://go.dev/issue/78282 · Note