# CVE-2026-91140: Progress Autonomous REST Connector command injection in file cleanup

Source: https://junglewise.ai/threats/cve-2026-91140-an-os-command-injection-vulnerability-in-the-shell-based  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-06. Updated: 2026-10-06  
License: CC BY 4.0 with a link back

CVE-2026-91140 · Severity: critical · CVSS 9.6 · Published 2026-10-06

Progress Autonomous REST Connector's GenAI generator tool is used by developers to create REST APIs from Swagger/OpenAPI specifications. An attacker can supply a malicious API specification that injects arbitrary shell commands, which execute on the developer's machine when the generator is invoked, leading to complete compromise of the development environment.

Vendors: [Progress Software](https://junglewise.ai/threats/vendors/progress-software).

## Quick answers

**Is CVE-2026-91140 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-91140 being exploited in the wild.

**How severe is CVE-2026-91140?** Critical severity, with a CVSS score of 9.6, published 6 October 2026.

**Which products and versions are affected?** Progress Software Autonomous REST Connector GenAI Agents ARCGenAI-Generator 2.0.

**Is there a fix for CVE-2026-91140?** 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-2026-91140 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-91140?** Check whether you run Progress Software Autonomous REST Connector GenAI Agents ARCGenAI-Generator 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 an OS command injection flaw in the shell-based temporary file cleanup instructions within the generator. The vulnerability exists in GenAI Agents ARCGenAI-Generator version 2.0. An unauthenticated attacker can craft a malicious Swagger/OpenAPI document to break out of the shell command context and execute arbitrary commands with the privileges of the user running the generator. The fix involves properly quoting shell filename variables (as evidenced by the public commit XDBC-77958).

## Affected products

- Progress Software Autonomous REST Connector GenAI Agents ARCGenAI-Generator 2.0

## Timeline

- 2026-10-06: disclosed

## References

- [https://community.progress.com/s/article/Progress-DataDirect-Critical-Security-Alert-Bulletin-September-2026-CVE-2026-91140](https://community.progress.com/s/article/Progress-DataDirect-Critical-Security-Alert-Bulletin-September-2026-CVE-2026-91140)
- [https://github.com/progress/datadirect-arc-ai-model-gen/commit/7ede6d96eb033d647ffdcabf8d8069c098293575](https://github.com/progress/datadirect-arc-ai-model-gen/commit/7ede6d96eb033d647ffdcabf8d8069c098293575)