SSRF in Langchain Langchain_core
CVE-2026-26013
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-e…
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.004 (30.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
Affected products
- Langchain Langchain_core
- Langchain-ai Langchain — versions < 1.2.11
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (Product, x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-26013?
- CVE-2026-26013 is a low-severity vulnerability in Langchain Langchain_core, classified under Server-Side Request Forgery (SSRF). CVSS score: 3.7/10. Published 2026-02-10.
- How severe is CVE-2026-26013?
- Low severity. CVSS v3 base score is 3.7 out of 10.