CVE-2024-27444Network attack vector

Unauthenticated code execution via PALChain attribute bypass

Published Feb 26, 2024 · Updated Aug 6, 2024

Arbitrary code execution in LangChain Experimental before 0.0.52 allows remote attackers to run Python via crafted PALChain input. PALValidation.validate_code walks the submitted syntax tree but fails to reject dangerous attribute access such as globals and subclasses. A deployment must expose PALChain to attacker-controlled prompts; successful exploitation runs code with the hosting process's permissions.

CVSS severity9.3
Critical
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Arbitrary code execution in LangChain Experimental before 0.0.52 allows remote attackers to run Python via crafted PALChain input. PALValidation.validate_code walks the submitted syntax tree but fails to reject dangerous attribute access such as globals and subclasses. A deployment must expose PALChain to attacker-controlled prompts; successful exploitation runs code with the hosting process's permissions.

The record

CVE
CVE-2024-27444
Published
Feb 26, 2024
Updated
Aug 6, 2024
Vendor
LangChain
Product
LangChain Experimental
Classifications
CWE-749, T1059.006
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2024Record 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=0 <0.1.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LangChain · LangChain Experimentalversion=0 <0.1.8

Published CVSS scores

9.3GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
9.8CISA ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-749Exposed Dangerous Method or Function
T1059.006Command and Scripting Interpreter: Python

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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