CVE-2026-9317

High

Description

Nango before 0.71.6 contains a missing authentication vulnerability in the runner tRPC server that allows unauthenticated attackers to execute arbitrary JavaScript code by invoking the exposed start procedure without credentials. Attackers with network access to the runner port can send requests to the unauthenticated start procedure, bypassing the unenforced RUNNER_SECRET_KEY environment variable, to achieve remote code execution within the runner process.

SeverityHigh

CVSS8.1

Exploit probability—

ProductNango

PublishedSep 4, 2026

First seenSep 4, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

NangoHQ nango0.71.6 or later

Patches

Vendor advisories

github.com/NangoHQ/nango/releases/tag/v0.71.6

Affected products

Product	Affected versions	Fixed in
NangoHQ nango	v < 0.71.6	0.71.6

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