CVE-2023-39631

criticalpriority · track · 40EPSS 0.016 · 76 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

1.60% (76th) EPSS

CVSS 9.8 · critical

Is it mine?

6 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

An issue in LanChain-ai Langchain v.0.0.245 allows a remote attacker to execute arbitrary code via the evaluate function in the numexpr library.

cvss

Technical severity, 0–10. One row per scoring source.

9.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9

v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · OSV

v3.19criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-94USprimaryCWE-94USCWE-94US

affected products (6)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
LangChain Inc LangChain≤ 0.0.245fstec_bduRU
ООО «Ред Софт» РЕД ОС≤ 7.3fstec_bduRU
langchain langchain= 0.0.245nvdUScpe:2.3:a:langchain:langchain:*:*:*:*:*:*:*:*
PyPI langchain< 0.0.308osvUSpkg:pypi/langchain
PyPI numexpr< 2.8.5osvUSpkg:pypi/numexpr

advisories (3)

Vendor and ecosystem advisories describing this.

GHSA-f73w-4m7g-ch9xLangchain vulnerable to arbitrary code execution via the evaluate function in the numexpr library2023-09-01ghsa · osvUS
An issue in LanChain-ai Langchain v.0.0.245 allows a remote attacker to execute arbitrary code via the evaluate function in the numexpr library. Patches: Released in v.0.0.308. numexpr dependency is optional for langchain.
PYSEC-2023-1622023-09-01vendor · osvUS
An issue in LanChain-ai Langchain v.0.0.245 allows a remote attacker to execute arbitrary code via the evaluate function in the numexpr library.
PYSEC-2023-1632023-09-01vendor · osvUS
An issue in LanChain-ai Langchain v.0.0.245 allows a remote attacker to execute arbitrary code via the evaluate function in the numexpr library.

also known as (9)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv nvd NVD CVE.org MITRE

published 2023-09-01modified 2026-06-17

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+10440 more

references (8)

External citations — patches, advisories, analysis.

https://cxsecurity.com/cveshow/CVE-2023-39631/cnnvd
https://github.com/langchain-ai/langchain/issues/8363 cnnvd
https://github.com/langchain-ai/langchain/releases/tag/v0.0.279Patchcnnvd
https://github.com/pydata/numexpr/issues/442 cnnvd
https://github.com/langchain-ai/langchain/issues/8363 enisa_euvd
https://github.com/pydata/numexpr/issues/442 enisa_euvd
https://github.com/langchain-ai/langchain/issues/8363ExploitIssue TrackingPatchThird Party Advisorynvd
https://github.com/pydata/numexpr/issues/442ExploitIssue TrackingPatchThird Party Advisorynvd

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