CVE-2026-44473 Ella Core: UE Downlink Redirection via Forged PDUSessionResourceSetupResponse
Attackers can redirect user equipment traffic by forging session setup responses, bypassing association checks in Ella Core 5G networks.
- 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-2026-44473?
CVE-2026-44473 is a high-severity missing authorization vulnerability in ellanetworks core, published on 27 May 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. Prior to 1.10.0, a radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE's AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE's logical NG-connection, then creates a GTP tunnel towards that radio. This vulnerability is fixed in 1.10.0.
Which versions are affected by CVE-2026-44473?
3 open source packages ship an affected version, including github.com/ellanetworks/core.
| Package | Affected | Fixed in |
|---|---|---|
github.com/ellanetworks/core Go | All versions | 1.10.0 |
github.com/ellanetworks/core Go | All versions | 1.10.0 |
github.com/ellanetworks/core Go | All versions | 1.10.0 |
How do I fix CVE-2026-44473?
Upgrade github.com/ellanetworks/core to 1.10.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-44473 being exploited?
There is no known exploitation of CVE-2026-44473 in the wild and no public exploit code.
Sources
Also known as GHSA-qfxw-v8qx-vj3v, GO-2026-5581.