CVE-2026-26019: LangChain Community RecursiveUrlLoader SSRF Bypass

# CVE-2026-26019: LangChain Community RecursiveUrlLoader SSRF Bypass

https://gcdradar.vercel.app/incidents/cve-2026-26019-langchain-community-recursiveurlloader-ssrf-b · AIR-2026-0467 · closed 2026-02-11

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-02-11
- AI role: Attack on AI
- Products: @langchain/community
- CVE ids: CVE-2026-26019
- CVSS: 4.1

## Summary

The RecursiveUrlLoader in langchain community used insufficient string prefix validation, enabling SSRF attacks via crafted URLs. A patch has been released to address the origin validation flaw.

## What to do

No action recorded; read the sources below and the vendor's advisory.

## Latest updates

- 2026-02-11: CVE-2026-26019: LangChain is a framework for building LLM-powered applications. (https://nvd.nist.gov/vuln/detail/CVE-2026-26019)
- 2026-02-11: CVE-2026-26019: @langchain/community affected by SSRF Bypass in RecursiveUrlLoader via insufficient URL origin validation (https://github.com/advisories/GHSA-gf3v-fwqg-4vh7)

## Sources

- 2026-02-11 GitHub Advisory Database: CVE-2026-26019: @langchain/community affected by SSRF Bypass in RecursiveUrlLoader via insufficient URL origin validation https://github.com/advisories/GHSA-gf3v-fwqg-4vh7
- 2026-02-11 NVD: CVE-2026-26019: LangChain is a framework for building LLM-powered applications. https://nvd.nist.gov/vuln/detail/CVE-2026-26019

Verify against the vendor's advisory before changing production. Data CC BY-SA 4.0, https://gcdradar.vercel.app.