CVE-2026-44473: Github.com/ellanetworks/core Remote Code Execution Vulnerability

HIGH
Advisory Identifier: GHSA-qfxw-v8qx-vj3v
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CVSS 7.1
CWE-358 CWE-863
Published
Advisory Summary

CVE-2026-44473 is a HIGH (CVSS 7.1) remote code execution vulnerability (CWE-358: Improperly Implemented Security Check for Standard) affecting Github.com/ellanetworks/core libraries in the Go ecosystem. The issue involves ella core vulnerable to ue downlink redirection via forged pdusessionresourcesetupresponse. Remediation is available by upgrading affected packages to version 1.10.0.

CVE-2026-44473 at a Glance

CVE Identifier CVE-2026-44473
GHSA Identifier GHSA-qfxw-v8qx-vj3v
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-358: Improperly Implemented Security Check for Standard
Affected Product Github.com/ellanetworks/core
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H).

Attack Vector Adjacent (AV:A)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-44473

To remediate this vulnerability, upgrade all affected Github.com/ellanetworks/core dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/ellanetworks/core fixed: 1.10.0 
Upgrade github.com/ellanetworks/core to 1.10.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/ellanetworks/core

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-44473, inspect your project dependencies for Github.com/ellanetworks/core:

inspect dependencies for github.com/ellanetworks/core

Analyze the terminal output to locate any version of Github.com/ellanetworks/core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.10.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-358: Improperly Implemented Security Check for Standard, where the product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique. In Github.com/ellanetworks/core, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## 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.

CVE-2026-44473 Affected Github.com/ellanetworks/core Versions

1 component(s)
Fixed Versions:
1.10.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/ellanetworks/core
golang/github.com/ellanetworks/core
Go
< 1.10.0
1.10.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ellanetworks/core/security/advisories/GHSA-qfxw-v8qx-vj3v
NVD — CVE-2026-44473 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-44473
Github.com/ellanetworks/core Source Repository REPOSITORY
https://github.com/ellanetworks/core

Frequently Asked Questions

What is CVE-2026-44473?
CVE-2026-44473 is a security vulnerability in Github.com/ellanetworks/core involving Ella Core Vulnerable to UE Downlink Redirection via Forged PDUSessionResourceSetupResponse under CWE-358: Improperly Implemented Security Check for Standard.
Which Github.com/ellanetworks/core versions are affected?
Affected versions include releases prior to 1.10.0 across affected packages: github.com/ellanetworks/core.
What version fixes CVE-2026-44473?
Upgrading to 1.10.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/ellanetworks/core affected?
Yes, github.com/ellanetworks/core is affected in releases prior to 1.10.0. Upgrade your dependency to 1.10.0 or later.
What is the CVSS score of CVE-2026-44473?
CVE-2026-44473 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
What CWE is associated with CVE-2026-44473?
CVE-2026-44473 is classified under CWE-358: Improperly Implemented Security Check for Standard (The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.).
How can I check Go dependencies for CVE-2026-44473?
Run the dependency tree command: 'inspect dependencies for github.com/ellanetworks/core'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-qfxw-v8qx-vj3v",
  "modified" : "2026-06-08T23:48:51Z",
  "published" : "2026-05-11T15:18:47Z",
  "aliases" : [ "CVE-2026-44473" ],
  "summary" : "Ella Core Vulnerable to UE Downlink Redirection via Forged PDUSessionResourceSetupResponse",
  "details" : "## Summary\n\nA 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.\n\n## Impact\n\nDownlink user-plane traffic for the targeted UE is redirected to the attacker's radio.\n\n## Fix\n\nUE context lookups are now scoped to the sending radio's SCTP association.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/ellanetworks/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.10.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ellanetworks/core/security/advisories/GHSA-qfxw-v8qx-vj3v"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-44473"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ellanetworks/core"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-358", "CWE-863" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-11T15:18:47Z",
    "nvd_published_at" : "2026-05-27T17:16:39Z"
  }
}