Vulnerability · Published Mar 23, 2026 · Assigned by GitHub_M

CVE-2026-33283Ella Core panics on malformed ULNASTransport Message without a Request Type

Medium 6.5

In plain English

A medium-severity null pointer dereference in core from ellanetworks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.4%top 67.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing malformed UL NAS Transport NAS messages without a Request Type. 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 1.6.0 adds a guard when receiving an UL NAS Message without a Request Type given no SM Context.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/ellanetworks/core	1.6.0	GHSA-3366-gw57-fcm5
Go	github.com/ellanetworks/core	1.6.0	GO-2026-4776

Affected products (as reported)

Vendor	Product	Versions
ellanetworks	core	< 1.6.0

Weakness: CWE-476 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

https://github.com/ellanetworks/core/security/advisories/GHSA-3366-gw57-fcm5 x_refsource_CONFIRM