CVE-2026-26013 — LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages
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 valu…
Published: 2026-02-10 · CVSS: 3.7 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7