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CVE Vendors Products Updated CVSS v3.1
CVE-2026-41488 2 Langchain, Langchain-ai 2 Langchain-openai, Langchain 2026-04-28 3.1 Low
LangChain is a framework for building agents and LLM-powered applications. Prior to 1.1.14, langchain-openai's _url_to_size() helper (used by get_num_tokens_from_messages for image token counting) validated URLs for SSRF protection and then fetched them in a separate network operation with independent DNS resolution. This left a TOCTOU / DNS rebinding window: an attacker-controlled hostname could resolve to a public IP during validation and then to a private/localhost IP during the actual fetch.