langchain Server-Side Request Forgery vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

3.7 · CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N

EPSS

• CVE-2024-0243: 0.52% estimated exploitation activity in the next 30 days; percentile 44.04 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

With the following crawler configuration: An attacker in control of the contents of https://example.com could place a malicious HTML file in there with links like "https://example.completely.different/myfile.html" and the crawler would proceed to download that file as well even though preventoutside=True. https://github.com/langchain-ai/langchain/blob/bf0b3cc0b5ade1fb95a5b1b6fa260e99064c2e22/libs/community/langchaincommunity/documentloaders/recursiveurlloader.py#L51-L51 Resolved in https://github.com/langchain-ai/langchain/pull/15559

Published by the source

26 Feb 2024, 18:30 UTC

Last modified by the source

7 Jul 2026, 17:56 UTC

Source last checked

26 Oct 2026, 13:37 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-h9j7-5xvc-qhg5

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record PYSEC-2024-235

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-h9j7-5xvc-qhg5

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2024-0243

Advisory: langchain Server-Side Request Forgery vulnerability
IDs: CVE-2024-0243, GHSA-h9j7-5xvc-qhg5
Record: https://patchnext.com/advisories/cve-2024-0243 (revision 3, source checked 26 Oct 2026, 13:37 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Low (CVSS 3.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: langchain-exa 0.1.0; langchain 0.1.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI langchain-exa: affected < 0.1.0; fixed in 0.1.0
- PyPI langchain: affected < 0.1.0; fixed in 0.1.0

## Suggested inspection (read-only)
- `python -m pip show langchain-exa`: prints the installed version. Run with the environment that serves production active.
- `python -m pip show langchain`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on langchain-exa, langchain.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-h9j7-5xvc-qhg5 (OSV record GHSA-h9j7-5xvc-qhg5 lists affected ranges: PyPI langchain >=0 <0.1.0 (fixed))
- Verified: https://osv.dev/vulnerability/PYSEC-2024-235 (OSV record PYSEC-2024-235 lists affected ranges: PyPI langchain-exa >=0 <0.1.0 (fixed))
- Verified: https://github.com/advisories/GHSA-h9j7-5xvc-qhg5 (GitHub-reviewed advisory GHSA-h9j7-5xvc-qhg5 lists affected ranges: PyPI langchain >=0 <0.1.0)

Commands are suggestions: review each one before running it.