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CVE-2026-42508 Critical

golang.org/x/crypto vulnerable to auth bypass via unenforced @revoked status

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.

Exploit probability 0.6%
Published June 25, 2026
Required by Not available
Last source change July 17, 2026

02 / AFFECTED SOFTWARE

Affected packages

Go golang.org/x/crypto
Go golang.org/x/crypto
Unknown Unknown

51 explicit affected versions

03 / CONNECTIONS

Connected vulnerabilities

related OPENSUSE-SU-2026:21483-1

04 / EVIDENCE

Source records

Open Source Vulnerabilities CVE-2026-42508

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.

View original source
Open Source Vulnerabilities GHSA-5cgq-3rg8-m6cv

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.

View original source
Open Source Vulnerabilities GO-2026-5021

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.

View original source

05 / REFERENCES

Further evidence