CVE-2026-33907: GO-2026-4872 - Ella Core Panics during NAS Authentication Response/Failure with missing IEs in github.com/ellanetworks/core

CVE-2026-33907 · Severity: medium · CVSS 6.5 · Published 2026-03-27

Ella Core is a 5G core designed for private networks. Versions prior to 1.7.0 panic when processing Authentication Response and Authentication Failure NAS message missing IEs. An attacker able to send crafted NAS messages to Ella Core can crash the process, causing service disruption for all connected subscribers. No authentication is required. Version 1.7.0 added IE presence verification to NAS message handling.

Technologies: Ellanetworks Ella Core, github.com/ellanetworks/core (Go). Vendors: Ellanetworks, Go.

Quick answers

Is CVE-2026-33907 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-33907 being exploited in the wild.
How severe is CVE-2026-33907?
Medium severity, with a CVSS score of 6.5, published 27 March 2026.
Which products and versions are affected?
github.com/ellanetworks/core (Go) SEMVER:introduced=0,fixed=1.7.0.
Is there a fix for CVE-2026-33907?
Yes. github.com/ellanetworks/core (Go): upgrade to 1.7.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-33907?
Check whether you run Ellanetworks Ella Core or github.com/ellanetworks/core (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/ellanetworks/core (Go): upgrade to 1.7.0 or later
    go get github.com/ellanetworks/core@v1.7.0

Affected products

  • Ellanetworks Ella Core
  • github.com/ellanetworks/core (Go) SEMVER:introduced=0,fixed=1.7.0

Identifiers

  • CVE-2026-33907
  • GHSA-55q8-2gwx-29pc
  • GO-2026-4872

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