CVE Intelligence

Langchain Langchain-openai vulnerabilities

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Published CVEs affecting Langchain Langchain-openai: 1 record(s), with affected versions and fixes.
cpe:2.3:a:langchain:langchain-openai

CVE-2026-41488 Low · 3.1 CWE-918 Apr 24, 2026
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 _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.