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CLEANSTART-2026-NM65993 — Security fix for CVE-2026-26019 applied in: n8n 2.28.0-r2

Affected: CleanStart: n8n

Security vulnerability affects the n8n package. This issue is resolved in later releases. See references for vulnerability details.

EUVD-2026-268256

fkie_cve-2026-26019

LangChain is a framework for building LLM-powered applications. Prior to 1.1.14, the RecursiveUrlLoader class in @langchain/community is a web crawler that recursively follows links from a starting URL. Its preventOutside option (enabled by default) is intended to restrict crawling to the same site as the base URL. The implementation used String.startsWith() to compare URLs, which does not perform semantic URL validation. An attacker who controls content on a crawled page could include links to domains that share a string prefix with the target, causing the crawler to follow links to attacker-controlled or internal infrastructure. Additionally, the crawler performed no validation against private or reserved IP addresses. A crawled page could include links targeting cloud metadata services, localhost, or RFC 1918 addresses, and the crawler would fetch them without restriction. This vulnerability is fixed in 1.1.14.

GHSA-gf3v-fwqg-4vh7 — @langchain/community affected by SSRF Bypass in RecursiveUrlLoader via insufficient URL origin validation

Affected: npm: @langchain/community

## Description

The `RecursiveUrlLoader` class in `@langchain/community` is a web crawler that recursively follows links from a starting URL. Its `preventOutside` option (enabled by default) is intended to restrict crawling to the same site as the base URL.

The implementation used `String.startsWith()` to compare URLs, which does not perform semantic URL validation. An attacker who controls content on a crawled page could include links to domains that share a string prefix with the target (e.g., `https://example.com.attacker.com` passes a `startsWith` check against `https://example.com`), causing the crawler to follow links to attacker-controlled or internal infrastructure.

Additionally, the crawler performed no validation against private or reserved IP addresses. A crawled page could include links targeting cloud metadata services (`169.254.169.254`), localhost, or RFC 1918 addresses, and the crawler would fetch them without restriction.

## Impact

An attacker who can influence the content of a page being crawled (e.g., by placing a link on a public-facing page, forum, or user-generated content) could cause the crawler to:

- Fetch cloud instance metadata (AWS, GCP, Azure), potentially exposing IAM credentials and session tokens - Access internal services on private networks (`10.x`, `172.16.x`, `192.168.x`) - Connect to localhost services - Exfiltrate response data via attacker-controlled redirect chains

This is exploitable in any environment where `RecursiveUrlLoader`…

WID-SEC-W-2026-0393 — LangChain: Mehrere Schwachstellen

Ein entfernter, anonymer oder authentisierter Angreifer kann mehrere Schwachstellen in LangChain ausnutzen,um eine Server-Side-Request-Forgery (SSRF) durchzuführen, was die Offenlegung von Informationen und einen begrenzten Denial-of-Service-Zustand ermöglicht.