High [CVE-2026-76139] Bundle build execs unpinned stolostron/release@master with full build credentials
This high-severity Red Hat Linux advisory covers CVE-2026-76139 affecting Red Hat Advanced Cluster Management for Kubernetes 2.
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Summary
A flaw was found in acm-operator-bundle. The build process for this component downloads and runs a script from a remote source without verifying its authenticity or integrity.
This script gains access to sensitive credentials, such as GitHub access tokens and registry passwords, used in the build environment. A remote attacker could exploit this vulnerability to inject malicious code, leading to unauthorized access to build resources and potential compromise of the resulting operator bundle.
It allows for the execution of unverified external scripts with elevated privileges, including access to sensitive credentials and write access to the bundle PR, which could compromise the integrity of shipped bundles. Red Hat severity: Important — CVSS 8 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H).
Weakness: CWE-829. Affected Red Hat products: Red Hat Advanced Cluster Management for Kubernetes 2.
Red Hat does not currently list a fixing RHSA for this CVE.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 49 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 49 minutes ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 49 minutes ago·verify at source
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