CVE-2026-42508
Critical
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.
SeverityCritical
CVSS9.1
Exploit probability—
ProductGolang Crypto
PublishedMay 22, 2026
First seenMay 22, 2026
Weakness typeCWE-295CWE-295
How to fix
Update
- golang crypto0.52.0 or later
- golang.org/x/crypto0.52.0 or later
Vendor advisories
- access.redhat.com/errata/RHSA-2026:41019
- access.redhat.com/errata/RHSA-2026:36796
- access.redhat.com/errata/RHSA-2026:37072
- access.redhat.com/errata/RHSA-2026:35833
- access.redhat.com/errata/RHSA-2026:51288
- access.redhat.com/errata/RHSA-2026:49944
- access.redhat.com/errata/RHSA-2026:67450
- access.redhat.com/errata/RHSA-2026:37123
- access.redhat.com/errata/RHSA-2026:61314
- access.redhat.com/errata/RHSA-2026:36808
- access.redhat.com/errata/RHSA-2026:66521
- access.redhat.com/errata/RHSA-2026:51033
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| golang crypto | v < 0.52.0 | 0.52.0 |
| golang.org/x/cryptoGo | v < 0.52.0 | 0.52.0 |
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