CVE-2026-26019Network attack vector

Internal resource access via incomplete URL validation

Published Feb 11, 2026 · Updated Feb 11, 2026

SSRF in RecursiveUrlLoader in LangChain Community before 1.1.14 allows context-dependent attackers to access internal resources. The loader uses String.startsWith() for same-site checks and accepts private, reserved, localhost, and cloud metadata destinations without validation. Exploitation requires control over content that the crawler processes; successful requests can expose responses from reachable internal services.

CVSS severity4.1
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SSRF in RecursiveUrlLoader in LangChain Community before 1.1.14 allows context-dependent attackers to access internal resources. The loader uses String.startsWith() for same-site checks and accepts private, reserved, localhost, and cloud metadata destinations without validation. Exploitation requires control over content that the crawler processes; successful requests can expose responses from reachable internal services.

The record

CVE
CVE-2026-26019
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
LangChain
Product
LangChain Community
Classifications
CWE-918
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.1.14

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

LangChain · LangChain Communityversion=< 1.1.14

Published CVSS scores

4.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-918Server-Side Request Forgery (SSRF)

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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