🛡️ CVE-2026-44473 — core

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-358 NVD

8.0

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

Ella Core Vulnerable to UE Downlink Redirection via Forged PDUSessionResourceSetupResponse

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.

How this vulnerability can be exploited

This issue can be reached from an adjacent network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability high.

Affected software

CVE-2026-44473 is recorded against 2 packages.

github.com/ellanetworks/core
unknown

Timeline and source

Published on 11 May 2026 and last revised on 25 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)

Details

Severity HIGH

CVSS Score 8.0

CVSS Vector CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CWE CWE-358

Public Exploit ✅ No

Source NVD

Published 2026-05-11

Updated 2026-08-12

Modified 2026-06-25

Fix URL N/A

Affected Packages

Software	From version	Fixed in
github.com/ellanetworks/core	—	—
unknown	—	—

References

WEB https://github.com/ellanetworks/core/security/advisories/GHSA-qfxw-v8qx-vj3v

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2026-44473

PACKAGE https://github.com/ellanetworks/core

🔗 NVD 🔗 Mitre

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