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CVE-2026-26013

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-26013

Severity

3.7

Low

CVSS V3

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Summary

LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages

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.

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