CVE-2026-32320 Ella Core: AMF DoS via malformed PathSwitchRequest with empty NR security capability bitstrings

Medium 6.5 Published 12 Mar 2026 Updated 14 Mar 2026

An attacker can crash the Ella Core AMF service by sending malformed NGAP messages, causing denial of service for all connected subscribers.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-32320?

CVE-2026-32320 is a medium-severity denial of service vulnerability in ellanetworks core, published on 12 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Ella Core is a 5G core designed for private networks. Prior to 1.5.1, Ella Core panics when processing a PathSwitchRequest containing UE Security Capabilities with zero-length NR encryption or integrity protection algorithm bitstrings, resulting in a denial of service. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. This vulnerability is fixed in 1.5.1.

Weakness: CWE-125

Which versions are affected by CVE-2026-32320?

3 open source packages ship an affected version, including github.com/ellanetworks/core. It affects 1 product.

Package	Affected	Fixed in
`github.com/ellanetworks/core` Go	All versions	`1.5.1`
`github.com/ellanetworks/core` Go	All versions	`1.5.1`
`github.com/ellanetworks/core` Go	All versions	`1.5.1`

Products include Ellanetworks Ella Core.

How do I fix CVE-2026-32320?

Upgrade github.com/ellanetworks/core to 1.5.1 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-32320 being exploited?

There is no known exploitation of CVE-2026-32320 in the wild and no public exploit code.

Sources

Also known as GHSA-j478-p7vq-3347, GO-2026-4691.