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CVE-2026-41488

nvd nist
Published: Apr 24, 2026Modified: Apr 28, 2026

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3.1
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
Exploitability: 1.6 / Impact: 1.4
Source: security-advisories@github.com (Secondary)

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 (1)

Langchain
1 product
Langchain Openai
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Langchain Openai
Before 1.1.14

Related CWEs

CWE-918
Server-Side Request Forgery (SSRF)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

References (1)

Source: security-advisories@github.com
MitigationVendor Advisory

Timeline

No history available yet.