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.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.0",
  "pubDate": "2026-08-19T21:17:38.070Z",
  "pubdate": "2026-08-19T21:17:38.070Z",
  "executiveSummary": "A supply chain vulnerability exists within the build process of acm-operator-bundle, specifically categorized as an insecure remote script execution flaw due to the lack of authenticity and integrity verification.\nThe vulnerability allows a remote attacker to execute arbitrary malicious code within the isolated build environment by leveraging the unverified retrieval and execution of remote scripts.\nDuring execution, the vulnerable build process exposes sensitive credentials, including GitHub access tokens and container registry passwords, to the execution context.\nSuccessful exploitation of this flaw can result in unauthorized access to sensitive build resources, compromise of the resulting operator bundle, and potential lateral movement into connected enterprise infrastructures.\nThe risk implications are critical, as compromised build artifacts can introduce backdoors into downstream deployments trusting the acm-operator-bundle.\nAttackers require the capability to intercept, modify, or spoof the retrieval channel of the remote script, or compromise the remote source directly, to successfully inject malicious payloads.\nNo specific authentication or specialized privilege requirements are inherent to the exploitation mechanism itself, provided the build environment automatically initiates the insecure download and execution sequence.",
  "technicalDetails": "The root cause of the vulnerability lies in the design of the build process for acm-operator-bundle, which relies on fetching and executing a script from a remote location without performing cryptographic verification, such as checksum validation, cryptographic hashing, or TLS certificate pinning with strict trust chains.\nThe vulnerable component is the build pipeline or script execution mechanism within acm-operator-bundle that automates external resource retrieval during compilation or packaging phases.\nThe attack vector involves network-based interception or tampering (such as Man-in-the-Middle attacks) or prior compromise of the remote server hosting the target script.\nStep-by-step attack flow: 1. The build environment for acm-operator-bundle initiates the build process. 2. The build script issues a network request to download a remote script without validating its integrity or provenance. 3. An attacker intercepts the transmission or compromises the remote hosting endpoint, replacing the legitimate script with a malicious payload. 4. The build environment executes the downloaded script locally within the build container or host. 5. The malicious payload executes with the privileges and environment of the build process. 6. The script accesses sensitive environment variables or configuration files containing GitHub access tokens and registry passwords. 7. The payload exfiltrates these credentials or modifies the resulting operator bundle to include unauthorized malicious code.\nThe post-exploitation impact includes full exposure of repository and registry credentials, enabling unauthorized code commits, private repository access, and the distribution of trojanized operator bundles to production environments.\nNetwork exposure is defined by the build environment's ability to reach external network locations to fetch the unverified remote script."
}