# CVE-2026-114362: HarnessRouter server-side request forgery in Targets endpoint

Source: https://junglewise.ai/threats/cve-2026-114362-a-flaw-has-been-found-in-harnessrouter-up-to-0-31-12-this  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-21. Updated: 2026-10-21  
License: CC BY 4.0 with a link back

CVE-2026-114362 · Severity: medium · CVSS 6.3 · Published 2026-10-21

HarnessRouter is a self-hosted unified interface for running code generation and AI models through a common API. A flaw in the Targets Test Endpoint allows remote attackers to manipulate a base_url parameter, causing the server to make requests to attacker-controlled destinations. This could lead to unauthorized access to internal systems, data exfiltration, or further compromise of the server infrastructure.

Technologies: [HarnessRouter](https://junglewise.ai/threats/technologies/harnessrouter). Vendors: [HarnessRouter](https://junglewise.ai/threats/vendors/harnessrouter).

## Quick answers

**Is CVE-2026-114362 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-114362 being exploited in the wild.

**How severe is CVE-2026-114362?** Medium severity, with a CVSS score of 6.3, published 21 October 2026.

**Which products and versions are affected?** HarnessRouter up to 0.31.12.

**Is there a fix for CVE-2026-114362?** Yes: fixed in 0.31.13. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-114362 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-114362?** Check whether you run HarnessRouter 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.

## How to fix

- Fixed in 0.31.13

## Technical details

A server-side request forgery (SSRF) vulnerability exists in gateway/app.py's handling of the base_url argument in the Targets Test Endpoint. The vulnerability can be exploited remotely without authentication by sending a maliciously crafted request with a manipulated base_url parameter. Attackers can use this to probe internal networks, access cloud metadata services, or interact with backend systems unavailable externally.

## Affected products

- HarnessRouter HarnessRouter up to 0.31.12

## Timeline

- 2026-10-21: disclosed

## References

- [https://github.com/HarnessRouter/harnessrouter/](https://github.com/HarnessRouter/harnessrouter/)
- [https://github.com/HarnessRouter/harnessrouter/commit/1c4b1fc1f89737dabd089ac1d1c174a57f764e28](https://github.com/HarnessRouter/harnessrouter/commit/1c4b1fc1f89737dabd089ac1d1c174a57f764e28)

## Related threats

- [HarnessRouter authentication bypass in API routes](https://junglewise.ai/threats/cve-2026-125331-harnessrouter-is-a-self-hosted-unified-api-for-running-agent)
- [HarnessRouter workspace API key scope bypass](https://junglewise.ai/threats/cve-2026-125330-harnessrouter-is-a-self-hosted-unified-api-for-agent-harnesses)
- [HarnessRouter improper authorization in identity mode](https://junglewise.ai/threats/cve-2026-114361-a-vulnerability-was-detected-in-harnessrouter-up-to-0-31-10-this)