# CVE-2026-51879: DeepTutor authorization bypass in TutorBotManager file write

Source: https://junglewise.ai/threats/cve-2026-51879-deeptutor-1-4-0-contains-an-authorization-bypass-through-a-user  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-01. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-51879 · Severity: info · Published 2026-10-01

DeepTutor is an educational platform that manages AI tutoring bots with configuration files. An attacker can modify another user's bot configuration files (such as behavior definitions) by guessing or enumerating bot identifiers, effectively taking over or sabotaging other users' bots. This allows unauthorized access to alter bot behavior and functionality.

Technologies: [HKUDS DeepTutor](https://junglewise.ai/threats/technologies/deeptutor). Vendors: [HKUDS](https://junglewise.ai/threats/vendors/hkuds).

## Quick answers

**Is CVE-2026-51879 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-51879 being exploited in the wild.

**How severe is CVE-2026-51879?** Informational severity, published 1 October 2026.

**Which products and versions are affected?** HKUDS DeepTutor 1.4.0.

**Is there a fix for CVE-2026-51879?** 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-2026-51879 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-51879?** Check whether you run HKUDS DeepTutor 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

An authorization bypass exists in deeptutor/services/tutorbot/manager.py:TutorBotManager.write_bot_file where the HTTP file write endpoint validates filenames against a whitelist but fails to verify the caller's ownership of the targeted bot_id. A remote, unauthenticated or low-privileged caller can enumerate bot IDs and send requests to the /api/v1/tutorbot/{bot_id}/files/{filename} endpoint with a bot_id they do not own, overwriting whitelisted control files like SOUL.md through a POST/PUT request with user-controlled content.

## Affected products

- HKUDS DeepTutor 1.4.0

## Timeline

- 2026-05-25: disclosed
- 2026-10-01: advisory

## References

- [https://gist.github.com/Ro1ME/ae1933a56ec31eccd2947fa64c1390e1](https://gist.github.com/Ro1ME/ae1933a56ec31eccd2947fa64c1390e1)
- [https://github.com/HKUDS/DeepTutor/issues/516](https://github.com/HKUDS/DeepTutor/issues/516)

## Related threats

- [DeepTutor code injection in shell execution tool](https://junglewise.ai/threats/cve-2026-51881-deeptutor-1-4-0-contains-code-injection-in-exectool-execute)
- [deeptutor path traversal in EditFileTool.execute](https://junglewise.ai/threats/cve-2026-51880-deeptutor-1-4-0-contains-a-path-traversal-issue-in-editfiletool)
- [DeepTutor authorization bypass in session regeneration](https://junglewise.ai/threats/cve-2026-51878-deeptutor-1-4-0-contains-an-authorization-bypass-through-a-user)
- [DeepTutor authorization bypass in book confirmation](https://junglewise.ai/threats/cve-2026-51876-deeptutor-1-4-0-contains-an-authorization-bypass-vulnerability-in)
- [DeepTutor command execution in ExecTool](https://junglewise.ai/threats/cve-2026-51870-deeptutor-v1-4-0-is-vulnerable-to-command-execution-in-tutorbot)