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Fencer Vulns
critical 9.8

CVE-2023-29374 in the critical feed json

LangChain vulnerable to code injection

published 2023-04-05 3 y ago modified 2026-06-17 4 mo ago also GHSA-fprp-p869-w6q2 , PYSEC-2023-18 , EUVD-2023-0118

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
39.7%
EPSS 39.7% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

In LangChain through 0.0.131, the LLMMathChain chain allows prompt injection attacks that can execute arbitrary code via the Python exec method.

Patch / fix

  • pypi langchain 0.0.132

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
20 mo ago

Exploit prediction

39.65% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/hwchase17/langchain/issues/814 referenced PoC, tagged "exploit" by a source, unverified
  • twitter.com https://twitter.com/rharang/status/1641899743608463365/photo/1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
pypi langchain
<=0.0.131
<0.0.132
0.0.132

Classification

Weakness
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component
  • CWE-94 Improper Control of Generation of Code

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.