CVE-2026-33907 Ella Core Panics during NAS Authentication Response/Failure with missing IEs

What is CVE-2026-33907?

CVE-2026-33907 is a medium-severity vulnerability in ellanetworks core, published on 27 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Ella Core is a 5G core designed for private networks. Versions prior to 1.7.0 panic when processing Authentication Response and Authentication Failure NAS message missing IEs. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.7.0 added IE presence verification to NAS message handling.

Weakness: CWE-476

Which versions are affected by CVE-2026-33907?

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

Products include Ellanetworks Ella Core.

How do I fix CVE-2026-33907?

Upgrade github.com/ellanetworks/core to 1.7.0 or later.

Is CVE-2026-33907 being exploited?

There is no known exploitation of CVE-2026-33907 in the wild and no public exploit code.

Other vulnerabilities in ellanetworks core

• CVE-2026-33282 Ella Core panics on malformed NGAP Location Report High 7.5
• CVE-2026-32319 Ella Core: Unauthenticated AMF DoS via malformed InitialUEMessage with undersized integrity-protected NAS payload High 7.5
• CVE-2026-33906 Ella Core has Privilege Escalation via Database Restore by NetworkManager role High 7.2
• CVE-2026-33903 Ella Core panics when processing a crafted NGAP LocationReport message Medium 6.5
• CVE-2026-33904 Ella Core has a Denial of Service via SCTP connection cleanup deadlock Medium 6.5

Sources

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

Also known as GHSA-55q8-2gwx-29pc, GO-2026-4872.