Vulnerability · Published May 27, 2026 · Assigned by GitHub_M

CVE-2026-44474Ella Core: Handover failures during concurrent Security Mode Command

Low 3.7

In plain English

A low-severity security flaw 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 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.1%top 97.1% 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. Prior to 1.10.0, Ella Core didn't enforce security rules on concurrent running of security procedures defined in TS 33.501 §6.9.5.1 — it could send a NAS Security Mode Command while an N2 handover was still pending (and vice versa). Concurrent Security Mode Command and N2 handover produce a KgNB mismatch between the UE and target gNB, causing the handover to fail. Requires a stalled gNB + re-registration race to trigger. This vulnerability is fixed in 1.10.0.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/ellanetworks/core	1.10.0	GHSA-mc29-hmx6-856q
Go	github.com/ellanetworks/core	1.10.0	GO-2026-5502

Affected products (as reported)

Vendor	Product	Versions
ellanetworks	core	< 1.10.0

Weakness: CWE-358 · Vector: CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L

References

https://github.com/ellanetworks/core/security/advisories/GHSA-mc29-hmx6-856q x_refsource_CONFIRM