# CVE-2026-123989: ESEngine DeepSeek-Reasonix privilege escalation in build script execution

Source: https://junglewise.ai/threats/cve-2026-123989-a-vulnerability-was-found-in-esengine-deepseek-reasonix-up-to-1  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-07. Updated: 2026-11-07  
License: CC BY 4.0 with a link back

CVE-2026-123989 · Severity: medium · CVSS 6.3 · Published 2026-11-07

DeepSeek-Reasonix is a coding agent that uses AI to help developers with complex software engineering tasks. A vulnerability in its build script execution component allows attackers to manipulate permissions via the loadGitStatus function, potentially gaining unauthorized access to system resources. This could enable privilege escalation or unauthorized file access on systems running vulnerable versions.

Technologies: [Esengine DeepSeek-Reasonix](https://junglewise.ai/threats/technologies/deepseek-reasonix). Vendors: [Esengine](https://junglewise.ai/threats/vendors/esengine).

## Quick answers

**Is CVE-2026-123989 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-123989 being exploited in the wild.

**How severe is CVE-2026-123989?** Medium severity, with a CVSS score of 6.3, published 7 November 2026.

**Which products and versions are affected?** Esengine DeepSeek-Reasonix up to 1.33.0.

**Is there a fix for CVE-2026-123989?** Yes: fixed in 1.34.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-123989 attacked?** It is attacked over the network or with local access, in a software library.

**Am I affected by CVE-2026-123989?** Check whether you run Esengine DeepSeek-Reasonix 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 1.34.0

## Technical details

A privilege escalation vulnerability exists in the loadGitStatus function of the build.rs build script component. The vulnerability allows manipulation of permission states during build script execution, potentially leading to unauthorized access. The attack can be initiated remotely and is addressed by input validation and permission boundary enforcement in the fix.

## Affected products

- ESEngine DeepSeek-Reasonix up to 1.33.0

## Timeline

- 2026-11-07: disclosed

## References

- [https://github.com/esengine/DeepSeek-Reasonix/](https://github.com/esengine/DeepSeek-Reasonix/)
- [https://github.com/esengine/DeepSeek-Reasonix/commit/a54659c2c5b0f4e57aae2b44d41f421c6a71e8cf](https://github.com/esengine/DeepSeek-Reasonix/commit/a54659c2c5b0f4e57aae2b44d41f421c6a71e8cf)

## Related threats

- [esengine DeepSeek-Reasonix prompt injection in discoverDocs](https://junglewise.ai/threats/cve-2026-123653-a-security-vulnerability-has-been-detected-in-esengine-deepseek)
- [esengine DeepSeek-Reasonix OS command injection in git diff filter](https://junglewise.ai/threats/cve-2026-102437-os-command-injection-in-internal-gitcmd-git-diff-filter-clean)