CVE-2026-26013

LOW

3.7

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.

CVE Details

CVSS v3.1 Score3.7

SeverityLOW

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

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published2/10/2026

Last Modified3/17/2026

Sourcenvd

Honeypot Sightings0

Affected Products

langchain:langchain_core

Weaknesses (CWE)

CWE-918

References

https://github.com/langchain-ai/langchain/commit/2b4b1dc29a833d4053deba4c2b77a3848c834565(security-advisories@github.com)

https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.11(security-advisories@github.com)

https://github.com/langchain-ai/langchain/security/advisories/GHSA-2g6r-c272-w58r(security-advisories@github.com)

IOC Correlations

No correlations recorded

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