CVE-2026-44473: Ella Networks Ella Core traffic redirection in NGAP handling

CVE-2026-44473 · Severity: high · CVSS 7.1 · Published 2026-05-27

Ella Core, a software component used in private 5G networks, is vulnerable to a flaw that allows an attacker to intercept mobile device traffic. By sending a forged message from a connected radio, an attacker can trick the core network into redirecting a user's data downloads to the attacker's equipment. This could lead to unauthorized data access or a complete loss of service for the affected mobile user.

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

Quick answers

Is CVE-2026-44473 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-44473 being exploited in the wild.
How severe is CVE-2026-44473?
High severity, with a CVSS score of 7.1, 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-2026-44473?
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-2026-44473 attacked?
It is attacked from the adjacent network, in a hosted service.
Am I affected by CVE-2026-44473?
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 fails to verify that a PDUSessionResourceSetupResponse message arrives on the specific SCTP association bound to a User Equipment's (UE) logical NG-connection. An attacker with a valid NG Setup can send a forged response containing a target UE's AMF-UE-NGAP-ID. The core network then incorrectly creates a GTP tunnel towards the attacker's radio, redirecting all downlink user-plane traffic for that UE. This vulnerability is classified under CWE-358 (Improperly Implemented Security Check) and CWE-863 (Incorrect Authorization). A fix is available in version 1.10.0 which scopes UE context lookups to the sending radio's SCTP association.

Affected products

  • Ella Networks core < 1.10.0

Identifiers

  • CVE-2026-44473
  • GHSA-qfxw-v8qx-vj3v
  • GO-2026-5581

Timeline

  • 2026-05-06: disclosed
  • 2026-05-11: advisory: GitHub Advisory published
  • 2026-05-27: other: NVD published

References

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