CVE-2026-26013

Published February 10th, 2026

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CVSS v3

3.7

LOW

CVSS v2

N/A

Affected

PROJECT

Description

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.

langchain-ai/langchain

The agent engineering platform.

GitHub

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