High [CVE-2026-42508] Revocation bypass via unchecked SignatureKey
This high-severity Red Hat Linux advisory covers CVE-2026-42508 affecting RHEM 1.0 for RHEL 9, Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8).
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Summary
Revocation bypass via unchecked SignatureKey. Red Hat rates this important (CVSS 7.4).
Weakness: CWE-295. Affected package(s): golang1, advanced-cluster-security/rhacs-main-rhel8:1781686446, advanced-cluster-security/rhacs-main-rhel8:1781686458.
Resolved in Red Hat advisory RHSA-2026:23262 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: RHEM 1.0 for RHEL 9; Red Hat Enterprise Linux AppStream (v. 10); Red Hat Enterprise Linux AppStream (v. 8); Red Hat Enterprise Linux AppStream (v. 9); and 48 more.
- golang1-25-main-1.25.11-2.hum1
- golang1-26-main-1.26.4-2.hum1
- advanced-cluster-security/rhacs-main-rhel8:1781686446
- advanced-cluster-security/rhacs-main-rhel8:1781686458
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
- RHSA-2026:23262
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:23262 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 3 months ago·verify at source
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