Unverified Remote Script in RH acm-operator-bundle Grants Build Access
CVE-2026-76139 Published on August 19, 2026
Acm-operator-bundle: acm-operator-bundle: bundle build execs unpinned stolostron/release@master with full build credentials
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.
Vulnerability Analysis
CVE-2026-76139 can be exploited with network access, and requires user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Timeline
Reported to Red Hat.
Made public. 23 days later.
Weakness Type
Inclusion of Functionality from Untrusted Control Sphere
The software imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.
Products Associated with CVE-2026-76139
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Affected Versions
Red Hat Advanced Cluster Management for Kubernetes 2.11:- Version 1787704547 and below * is unaffected.
- Version 1787712120 and below * is unaffected.
- Version 1787704476 and below * is unaffected.
- Version 1787738299 and below * is unaffected.
- Version 1787711895 and below * is unaffected.
- Version 1787704231 and below * is unaffected.