CVE-2026-125330: harnessrouter · Insecure Direct Object Reference
Affects harnessrouterSource CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 0.31.7 soon.
Data as of 10 Nov 2026, 18:50 UTC
Thin evidence
One scorer or none| CNA (GitHub_M) | CVSS 3.1 | 7.5 |
|---|
- Patch
- Available – fixed in 0.31.7
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 10 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 10 Nov 2026.
What to do
Upgrade harnessrouter to 0.31.7.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| HarnessRouterharnessrouter | Affected
| Fixed in
|
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.
References
- github.com/HarnessRouter/harnessrouter/security/advisories/GHSA-9pjr-97x3-c4wv (opens in a new tab)
- github.com/HarnessRouter/harnessrouter/pull/417 (opens in a new tab)
- github.com/HarnessRouter/harnessrouter/commit/249c6cc9ab51a24a78f4e9809d356718f2ef74b1 (opens in a new tab)
- github.com/HarnessRouter/harnessrouter/releases/tag/v0.31.7 (opens in a new tab)