CVE-2026-10129 SSRF via HTTP Redirect Following in Langflow API Request Component

High 8.5 Published 30 Jun 2026 Updated 1 Jul 2026

Authenticated attackers can bypass SSRF protections in Langflow to access internal services and sensitive data via redirect following.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-10129?

CVE-2026-10129 is a high-severity server-side request forgery vulnerability in Langflow Langflow, published on 30 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

IBM Langflow OSS 1.0.0 through 1.9.3 contains a Server-Side Request Forgery (SSRF) protection bypass vulnerability in the API Request component. An authenticated attacker with low-level privileges (flow author role) can bypass SSRF protections by enabling the follow_redirects parameter and supplying a public URL that redirects to internal/localhost addresses. The vulnerability exists because the application validates only the initial URL but does not re-validate redirect destinations. This allows attackers to access internal HTTP services, localhost endpoints, cloud metadata services, and private network resources that should be unreachable when SSRF protection is enabled. Successful exploitation can lead to disclosure of sensitive information including credentials, tokens, internal API responses, and administrative panel data.

Weakness: CWE-918

Which versions are affected by CVE-2026-10129?

It affects 1 product.

Products include Langflow Langflow.

How do I fix CVE-2026-10129?

No fix has been published for CVE-2026-10129 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-2026-10129 being exploited?

There is no known exploitation of CVE-2026-10129 in the wild and no public exploit code.

All Langflow Langflow vulnerabilities

Sources

Also known as GHSA-33xg-qw74-fhr3.