CVE-2026-27795: LangChain Community RecursiveUrlLoader SSRF Bypass

# CVE-2026-27795: LangChain Community RecursiveUrlLoader SSRF Bypass

https://gcdradar.vercel.app/incidents/cve-2026-27795-langchain-community-recursiveurlloader-ssrf-b · AIR-2026-0476 · closed 2026-02-25

- Lane: Patch now
- Severity: 2 (Disclosed vulnerability)
- Fix status: Fix status unknown
- First reported: 2026-02-25
- AI role: Attack on AI
- Products: @langchain/community, RecursiveUrlLoader
- CVE ids: CVE-2026-27795
- CVSS: 4.1

## Summary

A redirect-based SSRF bypass vulnerability affects the RecursiveUrlLoader component in LangChain Community. The flaw permits underlying fetch operations to follow redirects to internal endpoints without revalidation.

## What to do

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

## Latest updates

- 2026-02-25: CVE-2026-27795: LangChain is a framework for building LLM-powered applications. (https://nvd.nist.gov/vuln/detail/CVE-2026-27795)
- 2026-02-25: CVE-2026-27795: LangChain Community: redirect chaining can lead to SSRF bypass via RecursiveUrlLoader (https://github.com/advisories/GHSA-mphv-75cg-56wg)

## Sources

- 2026-02-25 GitHub Advisory Database: CVE-2026-27795: LangChain Community: redirect chaining can lead to SSRF bypass via RecursiveUrlLoader https://github.com/advisories/GHSA-mphv-75cg-56wg
- 2026-02-25 NVD: CVE-2026-27795: LangChain is a framework for building LLM-powered applications. https://nvd.nist.gov/vuln/detail/CVE-2026-27795

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