CVE-2026-91140

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BaseFortify

Publication date: 2026-10-06

Last updated on: 2026-10-07

Assigner: Progress Software Corporation

Description

An OS command injection vulnerability in the shell-based temporary-file cleanup instructions in Progress Software Autonomous REST Connector GenAI Agents ARCGenAI-Generator version 2.0 allows an attacker who supplies a crafted Swagger/OpenAPI document to execute arbitrary commands on a developer's machine when a user invokes the generator.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-10-06

Last Modified

2026-10-07

Generated

2026-10-19

AI Q&A

2026-10-06

EPSS Evaluated

2026-10-18

NVD

CVE-2026-91140

EUVD

EUVD-2026-93397

Affected Vendors & Products

Vendor	Product	Version / Range
Progress	Software	Autonomous REST Connector GenAI Agents 2.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-78	The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Attack-Flow Graph

Executive Summary

This vulnerability is an OS command injection flaw in Progress Software Autonomous REST Connector GenAI Agents ARCGenAI-Generator version 2.0. It allows an attacker to execute arbitrary commands on a developer's machine by providing a specially crafted Swagger/OpenAPI document. The issue occurs during shell-based temporary-file cleanup when the generator processes untrusted filenames.

Detection Guidance

To detect this vulnerability, inspect systems running Progress Software Autonomous REST Connector GenAI Agents ARCGenAI-Generator version 2.0 for improper filename handling in Swagger/OpenAPI documents. Check for filenames containing shell metacharacters or path separators in file paths. Review logs for unexpected command execution during file cleanup processes.

Impact Analysis

If you use the vulnerable version of ARCGenAI-Generator, an attacker could trick you into processing a malicious Swagger/OpenAPI document. This could lead to arbitrary command execution on your machine, potentially allowing the attacker to steal data, install malware, or take control of your system.

Compliance Impact

This vulnerability could lead to unauthorized access or data breaches, violating GDPR and HIPAA requirements for data protection and security. Organizations using the vulnerable software may face compliance violations, legal penalties, and reputational damage if exploited.

Mitigation Strategies

Immediately update to the patched version of ARCGenAI-Generator that enforces strict filename allowlisting (^[A-Za-z0-9._-]+$) and quotes filenames in shell commands. Avoid using untrusted Swagger/OpenAPI documents until patched. Monitor for suspicious file operations or command executions on developer machines.

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