Low 3.7Published Feb 10, 2026

CVE-2026-26013LangChain affected by SSRF via image_url token counting in ChatOpenAI.get_num_tokens_from_messages

Updated under an hour ago (Oct 27, 2026, 2:50 AM ET)

Does this affect you?

It affects langchain-ai langchain and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for langchain-ai langchain

Exploited in the last 30 days

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.

CVSS: 3.7 LOW (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Feb 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

langchain-ai langchain langchain_ai:langchain (from the name)	before 1.2.11	CNA record
langchain langchain_core langchain:langchain_core	before 1.2.11	NVD

References

References

https://github.com/langchain-ai/langchain/security/advisories/GHSA-2g6r-c272-w58r	x-refsource-confirm, mitigation, vendor-advisory
https://github.com/langchain-ai/langchain/commit/2b4b1dc29a833d4053deba4c2b77a3848c834565	x-refsource-misc, patch
https://github.com/langchain-ai/langchain/releases/tag/langchain-core%3D%3D1.2.11	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.