Description

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.

INFO

Published Date :

2026-04-24T20:57:25.658Z

Last Modified :

2026-04-27T13:40:42.065Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-41488 vulnerability.

Vendors Products
Langchain
  • Langchain-openai
Langchain-ai
  • Langchain
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-41488.

URL Resource
https://github.com/langchain-ai/langchain/security/advisories/GHSA-r7w7-9xr2-qq2r cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-41488 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-41488 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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