SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2026-42508

Previously, a revoked 'SignatureKey' belonging to a CA was not correctly checked for revocation.

CRITICAL 9.1EPSS 7.31%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (7.31%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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 3.1
9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
7.31% probability · 94th percentile
CISA KEV
Not listed
Weakness
CWE-295
Affected
golang/crypto
Source
security@golang.org

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.