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 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.
CVE-2026-75939
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-75939
Red Hat OpenShift Container Platform 4.18
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Red Hat OpenShift Container Platform 4
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"cpes": [
"cpe:/a:redhat:openshift:4.18::el9"
],
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4.18",
"versions": [
{
"status": "unaffected",
"version": "1790828598",
"lessThan": "*",
"versionType": "rpm"
}
],
"packageName": "openshift4/oc-mirror-plugin-rhel9",
"collectionURL": "https://catalog.redhat.com/software/containers/",
"defaultStatus": "affected"
},
{
"cpes": [
"cpe:/a:redhat:openshift:4"
],
"vendor": "Red Hat",
"product": "Red Hat OpenShift Container Platform 4",
"packageName": "openshift4/oc-mirror-plugin-rhel8",
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-75939
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30101 · Revision 1
- Added to Heist Feed
- Publisher date