# CVE-2026-44473: core — Fixed in 1.10.0

🐹

🐹 Go

Not in CISA KEV

HIGH severity

# CVE-2026-44473 — core

HIGH 

CVE-2026-44473 is a high-severity (CVSS 7.1) CWE-358 vulnerability in github.com/ellanetworks/core. A fix is available for github.com/ellanetworks/core — see the affected versions and patch details below.

Ella Core: UE Downlink Redirection via Forged PDUSessionResourceSetupResponse

Also known as[GHSA-qfxw-v8qx-vj3v](/vulnerability/GHSA-qfxw-v8qx-vj3v)GO-2026-5581

Published

May 27, 2026

Updated

Oct 28, 2026

Affected

1 pkg

Patched

1 / 1

Exploits

None indexed

Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

## Exploitation Status

### No confirmed exploitation observed yet

-   CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-44473.

## EPSS Exploitation Probability

[via FIRST.org ↗](https://www.first.org/epss/)

0.2%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs6th percentile — riskier than 6% of all scored CVEsHighest risk

0.00%0.26%0.51%0.77%0.0%0.2%Jun 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from [FIRST.org EPSS](https://www.first.org/epss/).

## How urgent is this, really

## Where this sits among everything scored

## Real-World Exposure

1 pkg affected

🐹`github.com/ellanetworks/core`

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.

## Description

### Summary

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.

### Impact

Downlink user-plane traffic for the targeted UE is redirected to the attacker's radio.

### Fix

UE context lookups are now scoped to the sending radio's SCTP association.

## Affected Packages

1 total 1 fixed

Ecosystem

Package

Vulnerable range

Fix

🐹Go

`github.com/ellanetworks/core` 

all versions

1.10.0`go get github.com/ellanetworks/core@v1.10.0`

## Detection & mitigation playbook

Open-source dependency

1.  ### Detect
    
    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/ellanetworks/core, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
    
2.  ### Fix
    
    Update github.com/ellanetworks/core to 1.10.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-44473 is resolved across your whole dependency graph.
    
3.  ### Workarounds
    
    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.
    

## Frequently Asked Questions

\## Summary 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. ## Impact Downlink user-plane traffic for the targeted UE is redirected to the attacker's radio. ## Fix UE context lookups are now scoped to the sending radio's SCTP association.

O3 Security · Impact-Aware SCA

### Is CVE-2026-44473 in your dependencies?

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