CVE-2026-75939 — Openshift/oc-mirror: release signature verification: openpgp signatureerror checked before signed body is consumed
A flaw was found in openshift/oc-mirror. The tool incorrectly verifies PGP (Pretty Good Privacy) release image signatures by checking for signature errors before the entire sign…
Published: 2026-09-21 · CVSS: 7.4 · CVSS 3.1
A flaw was found in openshift/oc-mirror. The tool incorrectly verifies PGP (Pretty Good Privacy) release image signatures by checking for signature errors before the entire signed body is processed, leading to a bypass of the signature verification. A remote attacker, by intercepting or manipulating network traffic to the signature endpoint, could exploit this to craft a PGP message with a valid Red Hat release key ID but a forged signature. This enables the `oc-mirror` tool to accept and mirror a malicious release payload into a disconnected registry, potentially compromising the integrity of software deployments.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7