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.
History

Thu, 15 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift:4.18::el9
References

Thu, 24 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 22 Sep 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Mon, 21 Sep 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Redhat openshift Container Platform
Vendors & Products Redhat openshift Container Platform

Mon, 21 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Openshift/oc-mirror: release signature verification: openpgp signatureerror checked before signed body is consumed
First Time appeared Redhat
Redhat openshift
Weaknesses CWE-347
CPEs cpe:/a:redhat:openshift:4
Vendors & Products Redhat
Redhat openshift
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-21T14:05:10.429Z

Updated: 2026-10-15T19:13:57.118Z

Reserved: 2026-08-18T15:55:39.041Z

Link: CVE-2026-75939

cve-icon Vulnrichment

Updated: 2026-09-24T13:26:11.712Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-21T15:17:31.520

Modified: 2026-10-15T20:17:14.247

Link: CVE-2026-75939

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-21T13:27:53Z

Links: CVE-2026-75939 - Bugzilla