LangChain langchain_community TFIDFRetriever tfidf.py load_local server-side request forgery

published 2024-03-01 2 y ago modified 2026-06-17 4 mo ago also PYSEC-2024-278 , EUVD-2024-27022

cvss: 6.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 47%
public exploits: 0; none known

A vulnerability was found in LangChain langchain_community 0.0.26. It has been classified as critical. Affected is the function load_local in the library libs/community/langchain_community/retrievers/tfidf.py of the component TFIDFRetriever. The manipulation leads to server-side request forgery. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 0.0.27 is able to address this issue. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-255372.

Patch / fix

links 1

github.com/langchain-ai/langchain#18695 pull request

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-03-01)

Exploit prediction

0.58% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/bayuncao/vul-cve-16/tree/main/PoC.pkl referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.3	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CNA	3.0	6.3	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
CNA	2.0	6.5	AV:N/AC:L/Au:S/C:P/I:P/A:P
NVD	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
OSV	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-community	<=0.0.26	no fix listed

Affected products

LangChain langchain_community

Classification

Weakness

CWE-918 Server-Side Request Forgery

References

github.com /langchain-ai/langchain/pull/18695
issue-tracking, patch
github.com /bayuncao/vul-cve-16/tree/main/PoC.pkl
broken-link, exploit, web
vuldb.com /?id.255372
vdb-entry, technical-description, permissions-required, report
vuldb.com /?ctiid.255372
signature, permissions-required, report
github.com /bayuncao/vul-cve-16
broken-link, package

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.

Summary