CVE-2026-88889: Renovate command injection in Maven Wrapper manager

CVE-2026-88889 · Severity: high · CVSS 7.8 · Published 2026-09-10

Renovate is a popular automated dependency update tool used by development teams to keep project libraries current. When Renovate updates Maven Wrapper configurations in certain self-hosted deployment modes, it fails to sanitize malicious input parameters, allowing an attacker to inject arbitrary shell commands and gain code execution on the Renovate server. This could lead to data theft, system compromise, or use of the server for further attacks.

Technologies: Mend-Renovate-Ce, Mend Renovate-Ee-Server, Mend Renovate-Ee-Worker. Vendors: Mend.

Quick answers

Is CVE-2026-88889 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-88889 being exploited in the wild.
How severe is CVE-2026-88889?
High severity, with a CVSS score of 7.8, published 10 September 2026.
Which products and versions are affected?
Mend-Renovate-Ce < 15.4.0; Mend-Renovate-Enterprise-Edition < 10.4.0; Mend Renovate-Ce < 15.4.0; Mend Renovate-Ee-Server < 15.4.0; and 1 more.
Is there a fix for CVE-2026-88889?
A patch was published on 2026-08-27: Patched in Renovate 44.14.7 and Mend Enterprise 15.4.0 / 10.4.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-88889 attacked?
It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-88889?
Check whether you run Mend-Renovate-Ce, Mend-Renovate-Enterprise-Edition, Mend Renovate-Ce or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This is an OS command injection vulnerability (CWE-78) in Renovate's Maven Wrapper manager component. When Renovate processes maven-wrapper.properties files during Maven Wrapper updates in binarySource=docker mode, it fails to properly escape or validate the distributionType parameter before using it in shell command construction. An attacker can craft a malicious maven-wrapper.properties file in a repository with an injected distributionType value (e.g., "script; cp /etc/passwd /tmp/passwd") that executes arbitrary commands when Renovate processes the wrapper upgrade. The vulnerability requires the target to be running in binarySource=docker self-hosted mode and have access to a malicious repository. The fix is available in Renovate 44.14.7 and corresponding patched versions of commercial distributions.

Affected products

  • Renovate Renovate < 44.14.7
  • Mend renovate-ce < 15.4.0
  • Mend renovate-ee-server < 15.4.0
  • Mend renovate-ee-worker < 15.4.0
  • Mend mend-renovate-ce < 15.4.0
  • Mend mend-renovate-enterprise-edition < 10.4.0

Timeline

  • 2026-08-27: disclosed
  • 2026-08-27: patched: Patched in Renovate 44.14.7 and Mend Enterprise 15.4.0 / 10.4.0
  • 2026-09-10: advisory

References

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