CVE-2026-26013
Last modified
CVE-2026-26013 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. 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. EPSS estimates a 0.38% chance of exploitation in the next 30 days.
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/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Langchain | Langchain Core | < 1.2.11 |
References
- https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.11Product, Release Notes
- https://github.com/langchain-ai/langchain/security/advisories/GHSA-2g6r-c272-w58rMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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