CVE-2026-33903 Ella Core panics when processing a crafted NGAP LocationReport message
An attacker can crash the Ella Core 5G network service by sending a crafted NGAP LocationReport message, disrupting connectivity for all subscribers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33903?
CVE-2026-33903 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 a specially crafted NGAP LocationReport message. An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. Version 1.7.0 adds guards in NGAP Location Report handler.
Weakness: CWE-476
Which versions are affected by CVE-2026-33903?
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 | 1.7.0 |
github.com/ellanetworks/core Go | All versions | 1.7.0 |
github.com/ellanetworks/core Go | All versions | 1.7.0 |
Products include Ellanetworks Ella Core.
How do I fix CVE-2026-33903?
Upgrade github.com/ellanetworks/core to 1.7.0 or later.
Is CVE-2026-33903 being exploited?
There is no known exploitation of CVE-2026-33903 in the wild and no public exploit code.
Other vulnerabilities in ellanetworks core
- CVE-2026-33282 Ella Core panics on malformed NGAP Location Report
- CVE-2026-32319 Ella Core: Unauthenticated AMF DoS via malformed InitialUEMessage with undersized integrity-protected NAS payload
- CVE-2026-33906 Ella Core has Privilege Escalation via Database Restore by NetworkManager role
- CVE-2026-33904 Ella Core has a Denial of Service via SCTP connection cleanup deadlock
- CVE-2026-33907 Ella Core Panics during NAS Authentication Response/Failure with missing IEs
Sources
Also known as GHSA-f2f3-9cx3-wcmf, GO-2026-4875.