CVE-2026-44474: Ella Networks Ella Core improper security check in 5G NAS procedures

CVE-2026-44474 · Severity: low · CVSS 3.7 · Published 2026-05-27

Ella Core is a 5G core network platform used for private cellular networks. A flaw in how it handles security procedures can cause mobile devices to lose their connection during a handover between base stations. This results in a service outage for the affected user and requires a specific set of network conditions to occur.

Technologies: Ella Networks Ella Core, github.com/ellanetworks/core (Go). Vendors: Ella Networks, Go.

Quick answers

Is CVE-2026-44474 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-44474 being exploited in the wild.
How severe is CVE-2026-44474?
Low severity, with a CVSS score of 3.7, published 27 May 2026.
Which products and versions are affected?
Ella Networks Ella Core < 1.10.0; github.com/ellanetworks/core (Go) < 1.10.0, SEMVER:introduced=0,fixed=1.10.0.
Is there a fix for CVE-2026-44474?
Yes. github.com/ellanetworks/core (Go): upgrade to 1.10.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-44474 attacked?
It is attacked from the adjacent network, in a hosted service.
Am I affected by CVE-2026-44474?
Check whether you run Ella Networks Ella Core or github.com/ellanetworks/core (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/ellanetworks/core (Go): upgrade to 1.10.0 or later
    go get github.com/ellanetworks/core@v1.10.0

Technical details

Ella Core does not properly enforce the 3GPP TS 33.501 §6.9.5.1 standard regarding concurrent security procedures. Specifically, the system may send a NAS Security Mode Command while an N2 handover is still pending, or vice versa. This concurrency creates a KgNB key mismatch between the User Equipment (UE) and the target gNB, causing the handover to fail. Exploitation requires a specific race condition involving a stalled gNB and a re-registration event. The issue is addressed in version 1.10.0 by blocking concurrent Security Mode Command and N2 handover procedures.

Affected products

  • Ella Networks core < 1.10.0

Identifiers

  • CVE-2026-44474
  • GHSA-mc29-hmx6-856q
  • GO-2026-5502

Timeline

  • 2026-05-06: disclosed: Initial disclosure to vendor
  • 2026-05-11: advisory: GitHub Advisory published
  • 2026-05-27: other: NVD published date

References

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