# CVE-2026-120204: DeepInfer path traversal in /profile endpoint

Source: https://junglewise.ai/threats/cve-2026-120204-deepinfer-through-0-1-0-contains-a-path-traversal-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-31. Updated: 2026-10-31  
License: CC BY 4.0 with a link back

CVE-2026-120204 · Severity: medium · CVSS 5.6 · Published 2026-10-31

DeepInfer is a high-performance inference framework for large-scale AI model serving. An unauthenticated attacker can exploit a path traversal vulnerability in the /profile endpoint to create arbitrary directories on the server, write files to exhaust disk space or inodes, and leverage error messages to probe the filesystem. Attackers can trigger this via cross-site requests from a user's browser, making exploitation passive from the target's perspective.

Vendors: [DeepSeek](https://junglewise.ai/threats/vendors/deepseek).

## Quick answers

**Is CVE-2026-120204 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-120204 being exploited in the wild.

**How severe is CVE-2026-120204?** Medium severity, with a CVSS score of 5.6, published 31 October 2026.

**Which products and versions are affected?** DeepSeek DeepInfer through 0.1.0.

**Is there a fix for CVE-2026-120204?** 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-2026-120204 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-120204?** Check whether you run DeepSeek DeepInfer 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 vulnerability is a path traversal flaw in the unauthenticated /profile HTTP endpoint, where the output_dir parameter fails to properly sanitize user input. An attacker can provide directory traversal sequences (e.g., ../) to write chrome trace files outside the intended directory, causing denial of service via disk/inode exhaustion and filesystem reconnaissance via error message side-channels. No authentication is required; network access to the profiling server is sufficient for exploitation.

## Affected products

- DeepSeek DeepInfer through 0.1.0

## Timeline

- 2026-10-31: disclosed

## References

- [https://github.com/deepseek-ai/DeepInfer](https://github.com/deepseek-ai/DeepInfer)
- [https://github.com/deepseek-ai/DeepInfer/blob/553741557a57df44a46fb3ab72b6aafeaf945337/deepinfer/engine/profile_server.py](https://github.com/deepseek-ai/DeepInfer/blob/553741557a57df44a46fb3ab72b6aafeaf945337/deepinfer/engine/profile_server.py)