---
title: "CVE-2026-109440: LangAlpha - Command Injection"
description: "LangAlpha through 2026.09.07 contains an indirect prompt injection vulnerability caused by lack of allow-list and human approval in Bash and ExecuteCode components, letting remote attackers execute shell or Python commands and exfiltrate secrets, exploit requires attacker to plant malicious instructions in web content."
url: https://panop.io/threat-heartbeat/CVE-2026-109440/
---

# CVE-2026-109440 LangAlpha - Command Injection

LangAlpha through 2026.09.07 contains an indirect prompt injection vulnerability caused by lack of allow-list and human approval in Bash and ExecuteCode components, letting remote attackers execute shell or Python commands and exfiltrate secrets, exploit requires attacker to plant malicious instructions in web content.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-109440)

## Details

Type

Command Injection

Impact

Remote Code Execution, Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Published

20 October 2026

Updated

20 October 2026

## Vendor fix

Update to the latest version beyond 2026.09.07 with proper allow-list and human-in-the-loop approval mechanisms.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-109440](https://nvd.nist.gov/vuln/detail/CVE-2026-109440)
- [https://github.com/ginlix-ai/LangAlpha/blob/435a5a44fabdeb33e409a62d233a936d96241c86/src/ptc\_agent/agent/agent.py#L524](https://github.com/ginlix-ai/LangAlpha/blob/435a5a44fabdeb33e409a62d233a936d96241c86/src/ptc_agent/agent/agent.py#L524)
- [https://www.lasso.security/vulnerability-database/cve-2026-109440](https://www.lasso.security/vulnerability-database/cve-2026-109440)
- [https://www.vulncheck.com/advisories/langalpha-through-2026.09.07-indirect-prompt-injection-rce-via-bash-and-executecode](https://www.vulncheck.com/advisories/langalpha-through-2026.09.07-indirect-prompt-injection-rce-via-bash-and-executecode)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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