CVE-2026-125330 HarnessRouter is a self-hosted unified API for agent harnesses.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-125330?
CVE-2026-125330 is a high-severity vulnerability in harnessrouter, published on 10 Nov 2026.
Official description
HarnessRouter is a self-hosted unified API for agent harnesses. From version 0.4.2 until 0.31.7, routes that accept a session ID or response ID validate only the caller's organization and do not enforce the workspace scope of a non-default workspace API key. A key holder who learns a non-guessable identifier from another workspace in the same organization can read sessions, conversation turns, files, traces, and responses, overwrite files, cancel or delete sessions, and publish share links. The issue does not cross organization boundaries, and console users, organization keys, and Default Workspace keys intentionally retain organization-wide access. This issue is fixed in version 0.31.7.
Weakness: CWE-639
Which versions are affected by CVE-2026-125330?
How do I fix CVE-2026-125330?
No fix has been published for CVE-2026-125330 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-125330 being exploited?
There is no known exploitation of CVE-2026-125330 in the wild and no public exploit code.
Sources
Also known as GHSA-9pjr-97x3-c4wv.