CVE-2026-41488

A flaw was found in langchain-openai. A remote attacker could exploit a Time-of-Check to Time-of-Use TOCTOU vulnerability, also known as a DNS rebinding vulnerability. This occurs because the urltosize helper, used for image token counting, validates URLs for Server-Side Request Forgery SSRF...

PYSEC-2026-76

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.1.14, langchain-openai's urltosize helper used by getnumtokensfrommessages for image token counting validated URLs for SSRF protection and then fetched them in a separate network operation with independent DNS...

CVE-2026-41488 angchain-openai: Image token counting SSRF protection can be bypassed via DNS rebinding

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.1.14, langchain-openai's urltosize helper used by getnumtokensfrommessages for image token counting validated URLs for SSRF protection and then fetched them in a separate network operation with independent DNS...

CVE-2026-41488 angchain-openai: Image token counting SSRF protection can be bypassed via DNS rebinding

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.1.14, langchain-openai's urltosize helper used by getnumtokensfrommessages for image token counting validated URLs for SSRF protection and then fetched them in a separate network operation with independent DNS...

CVE-2026-41488

CVE-2026-41488 affects the langchain-openai component prior to version 1.1.14. The issue stems from the _url_to_size() helper (used by get_num_tokens_from_messages for image token counting): it validates URLs to provide SSRF protection, then fetches them in a separate network operation with an in...

Server-side Request Forgery (SSRF)

Overview langchain-openai is an An integration package connecting OpenAI and LangChain Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the image token counting urltosize function. An attacker can access internal network resources by exploiting a DNS...

GHSA-2G6R-C272-W58R LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages

Server-Side Request Forgery SSRF in ChatOpenAI Image Token Counting Summary The ChatOpenAI.getnumtokensfrommessages method fetches arbitrary imageurl values without validation when computing token counts for vision-enabled models. This allows attackers to trigger Server-Side Request Forgery SSRF...

Server-side Request Forgery (SSRF)

Overview langchain-openai is an An integration package connecting OpenAI and LangChain Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the ChatOpenAI.getnumtokensfrommessages function. An attacker can cause the server to make internal network requests,...