CVEvulnerability

CVE-2026-41488

3.1 LOW Published 2026-04-24 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-04-24
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.1 LOW — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Weaknesses
CWE-918

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.

Affected configurations

• langchain langchain-openai (< 1.1.14)

Related

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References