CVE-2026-26013: LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages
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.
References
- github.com/advisories/GHSA-2g6r-c272-w58r
- github.com/langchain-ai/langchain
- github.com/langchain-ai/langchain/commit/2b4b1dc29a833d4053deba4c2b77a3848c834565
- github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.11
- github.com/langchain-ai/langchain/security/advisories/GHSA-2g6r-c272-w58r
- nvd.nist.gov/vuln/detail/CVE-2026-26013
Code Behaviors & Features
Detect and mitigate CVE-2026-26013 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →