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CVE-2026-26013
Good to know:
Date: February 10, 2026
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.
Severity Score
Related Resources (6)
Severity Score
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
CWE-918Top Fix
Upgrade Version
Upgrade to version langchain-core - 1.2.11;langchain-core - 1.2.11;https://github.com/langchain-ai/langchain.git - langchain-core==1.2.11
CVSS v3.1
| Base Score: |
|
|---|---|
| Attack Vector (AV): | NETWORK |
| Attack Complexity (AC): | HIGH |
| Privileges Required (PR): | NONE |
| User Interaction (UI): | NONE |
| Scope (S): | UNCHANGED |
| Confidentiality (C): | NONE |
| Integrity (I): | NONE |
| Availability (A): | LOW |