CVE-2026-26013

LowCVSS 3.7/10Last modified Jun 17, 2026

Description

LangChain is a framework for building agents and LLM-powered applications. Prior to 1.2.11, the ChatOpenAI.get_num_tokens_from_messages() method fetches arbitrary image_url values without validation when computing token counts for vision-enabled models. This allows attackers to trigger Server-Side Request Forgery (SSRF) attacks by providing malicious image URLs in user input. This vulnerability is fixed in 1.2.11.

Metrics

CVSS 3.1 3.7/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness enumeration

CWE-918

Affected software

No affected versions have been published.

Timeline

Published: Feb 10, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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