CVE-2026-33281: Github.com/ellanetworks/core Ella Core Panics On Invalid Vulnerability

MODERATE
Advisory Identifier: GHSA-q669-4gmv-g8mf
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CVSS 6.5
CWE-129
Published
Advisory Summary

CVE-2026-33281 is a MODERATE (CVSS 6.5) ella core panics on invalid vulnerability (CWE-129: Improper Validation of Array Index) affecting Github.com/ellanetworks/core libraries in the Go ecosystem. The issue involves ella core panics on invalid pdu session ids in ngap messages. Remediation is available by upgrading affected packages to version 1.6.0.

CVE-2026-33281 at a Glance

CVE Identifier CVE-2026-33281
GHSA Identifier GHSA-q669-4gmv-g8mf
Severity MODERATE
CVSS v3.1 Base Score 6.5
CWE Classification CWE-129: Improper Validation of Array Index
Affected Product Github.com/ellanetworks/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-2026-33281

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: 1.6.0 
Upgrade github.com/ellanetworks/core to 1.6.0
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-2026-33281, 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 1.6.0), 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-129: Improper Validation of Array Index, where the product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. 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 Ella Core panics when processing NGAP messages with invalid PDU Session IDs outside of 1-15. ## 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 PDU Session ID validations during NGAP message handling.

CVE-2026-33281 Affected Github.com/ellanetworks/core Versions

1 component(s)
Fixed Versions:
1.6.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/ellanetworks/core
golang/github.com/ellanetworks/core
Go
< 1.6.0
1.6.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/ellanetworks/core/security/advisories/GHSA-q669-4gmv-g8mf
NVD — CVE-2026-33281 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-33281
Github.com/ellanetworks/core Source Repository REPOSITORY
https://github.com/ellanetworks/core

Frequently Asked Questions

What is CVE-2026-33281?
CVE-2026-33281 is a security vulnerability in Github.com/ellanetworks/core involving Ella Core panics on invalid PDU Session IDs in NGAP messages under CWE-129: Improper Validation of Array Index.
Which Github.com/ellanetworks/core versions are affected?
Affected versions include releases prior to 1.6.0 across affected packages: github.com/ellanetworks/core.
What version fixes CVE-2026-33281?
Upgrading to 1.6.0 (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 1.6.0. Upgrade your dependency to 1.6.0 or later.
What is the CVSS score of CVE-2026-33281?
CVE-2026-33281 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-2026-33281?
CVE-2026-33281 is classified under CWE-129: Improper Validation of Array Index (The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.).
How can I check Go dependencies for CVE-2026-33281?
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-q669-4gmv-g8mf",
  "modified" : "2026-03-25T20:49:10Z",
  "published" : "2026-03-19T17:47:01Z",
  "aliases" : [ "CVE-2026-33281" ],
  "summary" : "Ella Core panics on invalid PDU Session IDs in NGAP messages",
  "details" : "## Summary\n\nElla Core panics when processing NGAP messages with invalid PDU Session IDs outside of 1-15.\n\n## Impact\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\nAdded PDU Session ID validations during NGAP message handling.",
  "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" : "1.6.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/ellanetworks/core/security/advisories/GHSA-q669-4gmv-g8mf"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-33281"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/ellanetworks/core"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-129" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-19T17:47:01Z",
    "nvd_published_at" : "2026-03-24T00:16:30Z"
  }
}