CVE-2026-75939

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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:79039
https://access.redhat.com/security/cve/CVE-2026-75939
https://bugzilla.redhat.com/show_bug.cgi?id=2517976

Configurations

No configuration.

History

15 Oct 2026, 20:17

Type	Values Removed	Values Added
References		() https://access.redhat.com/errata/RHSA-2026:79039 -

21 Sep 2026, 15:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-21 15:17

Updated : 2026-10-15 20:17

NVD link : CVE-2026-75939

Mitre link : CVE-2026-75939

CVE.ORG link : CVE-2026-75939

JSON object : View

Products Affected

No product.

CWE

CWE-347

Improper Verification of Cryptographic Signature

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