GO-2026-4947

vendorUSosv

Unexpected work during chain building in crypto/x509

view advisory published 2026-04-07Licence: per source

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-32280US	—	0.61% (49th)	—	2026-04-08
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 ca…

references

External citations — patches, advisories, analysis.

https://go.dev/cl/758320FIX
https://go.dev/issue/78282REPORT
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWUWEB

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