Medium 4.1Published Feb 11, 2026

CVE-2026-26019@langchain/community affected by SSRF Bypass in RecursiveUrlLoader via insufficient URL origin validation

Updated under an hour ago (Oct 26, 2026, 7:30 PM ET)

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It affects langchain-ai langchainjs and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for langchain-ai langchainjs

Exploited in the last 30 days

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.

CVSS: 4.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 12, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

langchain-ai langchainjs langchain_ai:langchainjs (from the name)	before 1.1.14	CNA record
langchain langchain_community langchain:langchain_community	before 1.1.14	NVD

References

References

https://github.com/langchain-ai/langchainjs/security/advisories/GHSA-gf3v-fwqg-4vh7	x-refsource-confirm, vendor-advisory
https://github.com/langchain-ai/langchainjs/pull/9990	x-refsource-misc, issue-tracking, patch
https://github.com/langchain-ai/langchainjs/commit/d5e3db0d01ab321ec70a875805b2f74aefdadf9d	x-refsource-misc, patch
https://github.com/langchain-ai/langchainjs/releases/tag/%40langchain%2Fcommunity%401.1.14	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.