CVE-2026-42508

high

Description

Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation. Now, both the 'key' and 'key.SignatureKey' are checked for @revoked.

References

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42508.json

https://pkg.go.dev/vuln/GO-2026-5021

https://groups.google.com/g/golang-announce/c/a082jnz-LvI

https://go.dev/issue/79568

https://go.dev/cl/781220

https://bugzilla.redhat.com/show_bug.cgi?id=2480688

https://access.redhat.com/security/cve/CVE-2026-42508

https://access.redhat.com/errata/RHSA-2026:35833

https://access.redhat.com/errata/RHSA-2026:26547

https://access.redhat.com/errata/RHSA-2026:26546

https://access.redhat.com/errata/RHSA-2026:23264

https://access.redhat.com/errata/RHSA-2026:23262

Details

Source: Mitre, NVD

Published: 2026-05-22

Updated: 2026-07-06

Risk Information

CVSS v2

Base Score: 9.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 7.4

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N