Vulnerability record · CVE-2026-26013 · published 10 February 2026

CVE-2026-26013: Langchain core server-side request forgery (ssrf) vulnerability

Langchain · Langchain Core

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.2.11, the ChatOpenAI.get_num_tokens_from_messages() method fetches arbitrary image_url values without validation when computing token counts for vision-enabled models. This allows attackers to trigger Server-Side Request Forgery (SSRF) attacks by providing malicious image URLs in user input. This vulnerability is fixed in 1.2.11.

3.7 CVSS 3.1 Low EPSS 0.42% · top 66.0% CWE-918 · Server-side request forgery (SSRF)

3.7CVSS 3.1 base score

0.42%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

17 Jun 2026Last modified by NVD

Description

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Langchain Core Langchain

References

Link	Tags
https://github.com/langchain-ai/langchain/commit/2b4b1dc29a833d4053deba4c2b77a3848c834565	Patch
https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.11	ProductRelease Notes
https://github.com/langchain-ai/langchain/security/advisories/GHSA-2g6r-c272-w58r	MitigationVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-26013), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.