Vulnerability 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.
CVSS Score
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Golang | Crypto | < 0.52.0 |
Related Weaknesses (CWE)
References
- https://go.dev/cl/781220Issue Tracking
- https://go.dev/issue/79568Issue Tracking
- https://groups.google.com/g/golang-announce/c/a082jnz-LvIMailing List
- https://pkg.go.dev/vuln/GO-2026-5021Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:23262
- https://access.redhat.com/errata/RHSA-2026:23264
- https://access.redhat.com/errata/RHSA-2026:26546
- https://access.redhat.com/errata/RHSA-2026:26547
- https://access.redhat.com/errata/RHSA-2026:35833
- https://access.redhat.com/errata/RHSA-2026:36648
- https://access.redhat.com/errata/RHSA-2026:36651
- https://access.redhat.com/errata/RHSA-2026:36796
- https://access.redhat.com/errata/RHSA-2026:36797
- https://access.redhat.com/errata/RHSA-2026:36808
- https://access.redhat.com/errata/RHSA-2026:37072
FAQ
What is CVE-2026-42508?
CVE-2026-42508 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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.
How severe is CVE-2026-42508?
CVE-2026-42508 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-42508?
Check the references section above for vendor advisories and patch information. Affected products include: Golang Crypto.