CVE-2026-81213 Langflow is vulnerable to server-side request forgery due to missing egress validation on server-side URL fetches

What is CVE-2026-81213?

CVE-2026-81213 is a high-severity server-side request forgery vulnerability in Langflow Langflow, published on 10 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

IBM Langflow OSS 1.0.0 through 1.11.5 could allow a remote attacker to obtain sensitive information from internal network resources due to improper validation of user-supplied URLs.

Weakness: CWE-918

Which versions are affected by CVE-2026-81213?

It affects 1 product.

Products include Langflow Langflow.

How do I fix CVE-2026-81213?

No fix has been published for CVE-2026-81213 yet. Limit exposure of the affected software until one is available.

Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.

Is CVE-2026-81213 being exploited?

There is no known exploitation of CVE-2026-81213 in the wild and no public exploit code.

Other vulnerabilities in Langflow Langflow

• CVE-2026-9198 IBM Langflow Code Injection Exploited Critical 9.8
• CVE-2026-0770 Langflow Inclusion of Functionality from Untrusted Control Sphere Exploited Critical 9.8
• CVE-2025-3248 Langflow Missing Authentication Exploited Critical 9.8
• CVE-2025-34291 Langflow Origin Validation Error Exploited Critical 9.4
• CVE-2026-33017 Langflow Code Injection Exploited Critical 9.3

All Langflow Langflow vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-hq58-536x-mhhx.