# CVE-2026-109402: conductor-oss conductor server-side request forgery in MCP Service

Source: https://junglewise.ai/threats/cve-2026-109402-a-vulnerability-was-found-in-conductor-oss-conductor-3-22-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109402 · Severity: medium · CVSS 6.3 · Published 2026-10-13

Conductor-oss conductor is a workflow orchestration platform used to coordinate distributed services and microservices. A server-side request forgery (SSRF) vulnerability in the MCP Service component allows an attacker to manipulate requests sent from the server to arbitrary endpoints, potentially leading to unauthorized access to internal systems or data exfiltration.

Technologies: [Conductor-Oss Conductor](https://junglewise.ai/threats/technologies/conductor-oss-conductor). Vendors: [Conductor-Oss](https://junglewise.ai/threats/vendors/conductor-oss).

## Quick answers

**Is CVE-2026-109402 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109402 being exploited in the wild.

**How severe is CVE-2026-109402?** Medium severity, with a CVSS score of 6.3, published 13 October 2026.

**Which products and versions are affected?** Conductor-Oss Conductor 3.22.0.

**Is there a fix for CVE-2026-109402?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-109402 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-109402?** Check whether you run Conductor-Oss Conductor 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

The MCPService.listTools function in the MCP Service component fails to properly validate the mcpServer argument, allowing an attacker to inject arbitrary values that are used in server-side requests. This SSRF vulnerability can be exploited remotely without authentication to forge requests to internal or external systems. The vulnerability was publicly disclosed and proof-of-concept code is available.

## Affected products

- conductor-oss conductor 3.22.0

## Timeline

- 2026-10-13: disclosed

## References

- [https://vuldb.com/cve/CVE-2026-109402](https://vuldb.com/cve/CVE-2026-109402)
- [https://vuldb.com/submit/979790](https://vuldb.com/submit/979790)

## Related threats

- [Conductor server-side request forgery in PLANNER_CONTEXT_FETCH task handler](https://junglewise.ai/threats/cve-2026-124507-a-vulnerability-was-found-in-conductor-oss-conductor-up-to-3-32)
- [conductor-oss conductor server-side request forgery in AgentController](https://junglewise.ai/threats/cve-2026-109404-a-vulnerability-was-identified-in-conductor-oss-conductor-up-to)
- [conductor-oss conductor server-side request forgery in Agent Card Fetching](https://junglewise.ai/threats/cve-2026-109403-a-vulnerability-was-determined-in-conductor-oss-conductor-up-to)
- [conductor-oss conductor server-side request forgery in API Tool Configuration](https://junglewise.ai/threats/cve-2026-109190-a-vulnerability-has-been-found-in-conductor-oss-conductor-3-31-2)