CVE-2026-32320: Ella Core Denial of Service Vulnerability

MODERATE
Advisory Identifier: GHSA-j478-p7vq-3347
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CVSS 6.5
CWE-125
Published
Advisory Summary

CVE-2026-32320 is a MODERATE (CVSS 6.5) denial of service vulnerability (CWE-125: Out-of-bounds Read) affecting Ella Core libraries in the Go ecosystem. The issue involves amf dos via malformed pathswitchrequest with empty nr security capability bitstrings. Remediation is available by upgrading affected packages to version 1.5.1.

CVE-2026-32320 at a Glance

CVE Identifier CVE-2026-32320
GHSA Identifier GHSA-j478-p7vq-3347
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-125: Out-of-bounds Read
Affected Product Ella Core
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 6.5

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

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

How to Fix CVE-2026-32320

To remediate this vulnerability, upgrade all affected Ella 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: 1.5.1 
Upgrade github.com/ellanetworks/core to 1.5.1
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-2026-32320, inspect your project dependencies for Ella Core:

inspect dependencies for github.com/ellanetworks/core

Analyze the terminal output to locate any version of Ella Core in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.5.1), 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-125: Out-of-bounds Read, where the product reads data past the end, or before the beginning, of the intended buffer. In Ella 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 Ella Core panics when processing a PathSwitchRequest containing UE Security Capabilities with zero-length NR encryption or integrity protection algorithm bitstrings, resulting in a denial of service. ## Impact An attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. ## Fix Added length validation on NR algorithm bitstrings before accessing them in the PathSwitchRequest handler.

CVE-2026-32320 Affected Ella Core Versions

1 component(s)
Fixed Versions:
1.5.1
Product / Package Ecosystem Affected Versions Fixed Version
github.com/ellanetworks/core
golang/github.com/ellanetworks/core
Go
< 1.5.1
1.5.1

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ellanetworks/core/security/advisories/GHSA-j478-p7vq-3347
NVD — CVE-2026-32320 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-32320
Ella Core Source Repository REPOSITORY
https://github.com/ellanetworks/core
Ella Core Release RELEASE
https://github.com/ellanetworks/core/releases/tag/v1.5.1
pkg.go.dev/vuln/go-2026-4691 WEB
https://pkg.go.dev/vuln/GO-2026-4691

Frequently Asked Questions

What is CVE-2026-32320?
CVE-2026-32320 is a security vulnerability in Ella Core involving AMF DoS via malformed PathSwitchRequest with empty NR security capability bitstrings under CWE-125: Out-of-bounds Read.
Which Ella Core versions are affected?
Affected versions include releases prior to 1.5.1 across affected packages: github.com/ellanetworks/core.
What version fixes CVE-2026-32320?
Upgrading to 1.5.1 (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 1.5.1. Upgrade your dependency to 1.5.1 or later.
What is the CVSS score of CVE-2026-32320?
CVE-2026-32320 has a CVSS v3.1 base score of 6.5 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-32320?
CVE-2026-32320 is classified under CWE-125: Out-of-bounds Read (The product reads data past the end, or before the beginning, of the intended buffer.).
How can I check Go dependencies for CVE-2026-32320?
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-j478-p7vq-3347",
  "modified" : "2026-03-16T16:38:02Z",
  "published" : "2026-03-12T20:33:28Z",
  "aliases" : [ "CVE-2026-32320" ],
  "summary" : "Ella Core: AMF DoS via malformed PathSwitchRequest with empty NR security capability bitstrings",
  "details" : "## Summary\n\nElla Core panics when processing a PathSwitchRequest containing UE Security Capabilities with zero-length NR encryption or integrity protection algorithm bitstrings, resulting in a denial of service.\n\n## Impact\n\nAn attacker able to send crafted NGAP messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required.\n\n## Fix\n\nAdded length validation on NR algorithm bitstrings before accessing them in the PathSwitchRequest handler.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/ellanetworks/core"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.5.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ellanetworks/core/security/advisories/GHSA-j478-p7vq-3347"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-32320"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ellanetworks/core"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ellanetworks/core/releases/tag/v1.5.1"
  }, {
    "type" : "WEB",
    "url" : "https://pkg.go.dev/vuln/GO-2026-4691"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-12T20:33:28Z",
    "nvd_published_at" : "2026-03-13T19:54:42Z"
  }
}