CVE-2026-3559 Philips Hue Bridge HomeKit Accessory Protocol Static Nonce Authentication Bypass Vulnerability

High 8.1 Published 13 Mar 2026 Updated 16 Mar 2026

Network-adjacent attackers can bypass authentication on Philips Hue Bridge devices due to a static nonce in the HomeKit Accessory Protocol.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-3559?

CVE-2026-3559 is a high-severity authentication bypass vulnerability in Philips Hue Bridge, published on 13 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Philips Hue Bridge HomeKit Accessory Protocol Static Nonce Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of Philips Hue Bridge. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the configuration of the SRP authentication mechanism in the HomeKit Accessory Protocol service, which listens on TCP port 8080 by default. The issue results from the use of a static nonce value. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-28451.

Weakness: CWE-323

Which versions are affected by CVE-2026-3559?

It affects 1 product.

Products include Philips Hue Bridge V2 Firmware.

How do I fix CVE-2026-3559?

No fix has been published for CVE-2026-3559 yet. Limit exposure of the affected software until one is available.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2026-3559 being exploited?

There is no known exploitation of CVE-2026-3559 in the wild and no public exploit code.

Sources

Also known as GHSA-393c-jhgx-p674.