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CVE-2026-76139— Acm-operator-bundle: acm-operator-bundle: bundle build execs unpinned stolostron/release@master with full build credentials

Quick assessment

Affected
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

发现 ACM Operator Bundle 存在一个安全漏洞。该组件的构建过程会从远程来源下载并执行一个脚本，但未对脚本的真实性和完整性进行验证。该脚本能够访问构建环境中使用的敏感凭据，例如 GitHub 访问令牌和镜像仓库密码。远程攻击者可利用此漏洞注入恶意代码，从而获得对构建资源的未授权访问，并可能导致最终生成的 Operator Bundle 遭到破坏。

CVSS 8.0 · High EPSS 0.33% · P25

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 any affected
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I. Basic Information for CVE-2026-76139

Vulnerability Information
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Vulnerability Title
Acm-operator-bundle: acm-operator-bundle: bundle build execs unpinned stolostron/release@master with full build credentials
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
从非可信控制范围包含功能例程
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Advanced Cluster Management for Kubernetes 2 - cpe:/a:redhat:acm:2

II. Public POCs for CVE-2026-76139

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III. Intelligence Information for CVE-2026-76139

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Vendor Advisories for CVE-2026-76139 (2)

Same Patch Batch · Red Hat · 2026-08-19 · 10 CVEs total

CVE-2026-70496 9.9 CRITICAL Search-v2-operator: search-v2-operator: operator clusterrole is cluster-admin equivalent v
CVE-2026-66794 9.3 CRITICAL Cluster-proxy-addon: cluster-proxy-addon: unauthenticated ssrf to arbitrary managed-cluste
CVE-2026-71470 9.1 CRITICAL Acm-search-v2-rhel9: search-v2-operator: search cr imageoverride/arguments/envvar flow uns
CVE-2026-75569 7.7 HIGH Mce-operator-bundle: mce-operator-bundle: bundle-generation business logic fetched from mu
CVE-2026-76235 7.5 HIGH Cockpit-ws: cockpit: cockpit-ws: unauthenticated remote memory leak via cockpitlang cookie
CVE-2026-76827 6.8 MEDIUM Search-indexer: search-indexer: update/delete operations not scoped to caller's cluster (c
CVE-2026-18874 6.2 MEDIUM Volsync-addon-controller: volsync-addon-controller: annotation values rendered into yaml v
CVE-2026-75900 6.1 MEDIUM Swtpm: swtpm: out-of-bounds read in swtpm_nvram_checkheader due to sizeof(pointer) vs size
CVE-2026-76166 4.3 MEDIUM Modcluster-core: mod_cluster advertise listener: unauthenticated dos via crafted multicast

IV. Related Vulnerabilities

Same product: Red Hat Advanced Cluster Management for Kubernetes 2
Same vendor: Red Hat
Same weakness: CWE-829

V. Comments for CVE-2026-76139

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