Unexpected work during chain building in crypto/x509
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.6%
exploitation probability
0.6%top 52% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Go standard library · crypto/x509References
https://go.dev/cl/758320https://go.dev/issue/78282https://groups.google.com/g/golang-announce/c/0uYbvbPZRWUhttps://pkg.go.dev/vuln/GO-2026-4947https://access.redhat.com/security/cve/CVE-2026-32280https://bugzilla.redhat.com/show_bug.cgi?id=2456339https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-32280.jsonhttps://access.redhat.com/errata/RHSA-2026:24762https://access.redhat.com/errata/RHSA-2026:41019https://access.redhat.com/errata/RHSA-2026:16101https://access.redhat.com/errata/RHSA-2026:54191https://access.redhat.com/errata/RHSA-2026:24761