3.7

CVE-2026-26013: langchain-ai langchain Server-Side Request Forgery (SSRF)

CVSS: 3.7v3.1LowAnalyzed
AliasesGHSA-2g6r-c272-w58rPYSEC-2026-2562CGA-8gfw-c59j-7hqh
Published 10-02-2026Last modified 11-02-2026
Open JSON

Vulnerability summary

CVE-2026-26013 is a low (CVSS 3.7) Server-Side Request Forgery (SSRF) vulnerability in langchain-ai langchain. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 39.4% of scored vulnerabilities.

Overall risk
15/100
0100
Low · default modelHow is this calculated?
CVSS score
3.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · +0.08 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-HJGH-MVQV-83HV

Timeline

  1. 10-02-2026
    PublishedVulnerability first disclosed.
  2. 11-02-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.08 pp

From 0.39% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.47%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard6 products
  • open-webui< 0.8.3-r0
  • py3-langchainAll versions (No fix recorded)
  • py3.10-langchainAll versions (No fix recorded)
  • py3.11-langchainAll versions (No fix recorded)
  • py3.12-langchainAll versions (No fix recorded)
Langchain1 product
Langchain-ai1 product
PyPI1 product
  • langchain-core< 1.2.11
Wolfi1 product
  • open-webui< 0.8.3-r0

5 vendors · 10 products

References

8 links