CVE-2026-26013 – LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages

CVE ID : CVE-2026-26013

Published : Feb. 10, 2026, 9:51 p.m. | 31 minutes ago

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.

Severity: 0.0 | NA

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