CVE-2026-44327free5GC is an open-source implementation of the 5G core network.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-oam route group without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can hit the OAM route with no Authorization header at all and the handler returns 200 OK. The current OAM handler is a stub that returns null, but the structural defect is route-group-scoped: the entire OAM route group has no inbound auth middleware, so every future OAM operation added to this group inherits the missing auth boundary by default. This vulnerability is fixed in 4.2.2.
- CVSS
- 10.0 CRITICAL (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
- Weakness (CWE)
- CWE-306, CWE-862
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
free5gc free5gc free5gc:free5gc | before 4.2.2 | NVD |
References
- https://github.com/free5gc/free5gc/issues/861exploit, issue-tracking
- https://github.com/free5gc/free5gc/security/advisories/GHSA-cmpj-2x3g-m7g3exploit, vendor-advisory
- https://github.com/free5gc/nef/pull/23issue-tracking, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.