CVE-2026-91140

Command execution via unsafe temporary-file cleanup

Published Oct 6, 2026 · Updated Oct 6, 2026

OS command injection in ARC GenAI Agents 2.0 allows attackers to execute commands on a developer host via a crafted OpenAPI document. The ARCGenAI-Generator temporary-file cleanup instructions embed a document-derived output name in shell commands without first ensuring that it is safe as shell data. Exploitation requires a developer to invoke the generator on the attacker-controlled document; commands execute with that developer's privileges, not through a network-facing service.

CVSS severityUnavailable
Unscored
EPSS probability1.92%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in ARC GenAI Agents 2.0 allows attackers to execute commands on a developer host via a crafted OpenAPI document. The ARCGenAI-Generator temporary-file cleanup instructions embed a document-derived output name in shell commands without first ensuring that it is safe as shell data. Exploitation requires a developer to invoke the generator on the attacker-controlled document; commands execute with that developer's privileges, not through a network-facing service.

The record

CVE
CVE-2026-91140
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
Progress Software Corporation
Product
ARC GenAI Agents
Classifications
T1204.002
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0 <2.1

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

Progress Software Corporation · ARC GenAI Agentsversion=2.0 <2.1

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1204.002Malicious File

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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