Quick answers
- Is CVE-2026-30069 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-30069 being exploited in the wild.
- How severe is CVE-2026-30069?
- High severity, with a CVSS score of 7.5, published 27 August 2026.
- Which products and versions are affected?
- free5GC v4.0.1.
- Is there a fix for CVE-2026-30069?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-30069 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-30069?
- Check whether you run free5GC 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.
Technical details
A NULL pointer dereference vulnerability exists in the RegistrationAmf3gppAccessProcedure function within the UDMC registration handler. The vulnerable code assumes required nested fields are present in the Amf3GppAccessRegistration payload and dereferences them without validation checks. An unauthenticated attacker can send a crafted HTTP PUT request with an incomplete JSON body to the /nudm-uecm/v1/{IMSI}/registrations/amf-3gpp-access endpoint, triggering a panic that crashes the UDM service. The vulnerability requires network access to the UDM service endpoint but no authentication. The impact is denial of service; patched versions should validate all required fields before dereferencing.
Affected products
- free5GC free5GC v4.0.1
Timeline
- 2026-01-01: disclosed: Bug report opened on GitHub
- 2026-08-27: advisory: CVE-2026-30069 published