How severe is CVE-2026-26013?

CVE-2026-26013 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-26013 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-26013?

CVE-2026-26013 affects Langchain Langchain Core. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-26013?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-26013 have an EU (EUVD) identifier?

Yes. CVE-2026-26013 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6240.

When was CVE-2026-26013 published?

CVE-2026-26013 was published on 2026-02-10 and last updated on 2026-06-17.

CVE-2026-26013

CVE-2026-26013 is a low-severity vulnerability in Langchain Langchain Core with a CVSS 3.x base score of 3.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
EPSS exploit prediction: 0% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-6240
Weakness: CWE-918
Affected product: Langchain Langchain Core
Published: 2026-02-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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-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.
How severe is CVE-2026-26013?: CVE-2026-26013 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-26013 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-26013?: CVE-2026-26013 affects Langchain Langchain Core. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-26013?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-26013 have an EU (EUVD) identifier?: Yes. CVE-2026-26013 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-6240.
When was CVE-2026-26013 published?: CVE-2026-26013 was published on 2026-02-10 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:langchain:langchain_core:*:*:*:*:*:python:*:*

More vulnerabilities in Langchain Langchain Core

CVE-2025-68664 — Critical (CVSS 9.3): LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a…
CVE-2026-34070 — High (CVSS 7.5): LangChain is a framework for building agents and LLM-powered applications. Prior to version 1.2.22, multiple functions…
CVE-2026-40087 — Medium (CVSS 5.3): LangChain is a framework for building agents and LLM-powered applications. Prior to 0.3.84 and 1.2.28, LangChain's…

All CVEs affecting Langchain Langchain Core →

Other CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities

CVE-2026-47938 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by a Server-Side Request Forgery (SSRF)…
CVE-2026-35431 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Entra ID Entitlement Management allows an unauthorized attacker to…
CVE-2026-32186 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Microsoft Bing allows an unauthorized attacker to elevate privileges over a…
CVE-2026-33107 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Azure Databricks allows an unauthorized attacker to elevate privileges over a…
CVE-2026-32871 — Critical (CVSS 10.0): FastMCP is a Pythonic way to build MCP servers and clients. Prior to version 3.2.0, the OpenAPIProvider in FastMCP…
CVE-2026-32169 — Critical (CVSS 10.0): Server-side request forgery (ssrf) in Azure Cloud Shell allows an unauthorized attacker to elevate privileges over a…

Browse all CWE-918 (Server-Side Request Forgery (SSRF)) vulnerabilities →