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TI-2026-32298 Aliases CVE-2026-44330GHSA-rwww-x45w-p52w

Incorrect authorization in free5gc

Priority HIGH 82CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-pfdmanagement route group without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can use a forged or arbitrary bearer token (e.g. Authorization: Bearer not-a-real-token) to read PFD application data via GET /applications and GET /applications/{appID}, and to create or delete PFD change-notification subscriptions via POST /subscriptions and DELETE /subscriptions/{subID}. Same root cause as the other NEF SBI findings: the route group is mounted without any inbound auth middleware. Unlike the OAM and traffic-influence groups, nnef-pfdmanagement IS declared in the runtime ServiceList, so this is the production-intended path that operators expect to be protected by OAuth2 setting receive from NRF: true -- and it is not. This vulnerability is fixed in 4.2.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00287 21st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed free5gc (free5gc): 4.2.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
free5gcfree5gcbefore 4.2.24.2.2Patch availableCNA
—github.com/free5gc/nef (Go)up to 1.2.3—No fix listedGHSA-rwww-x45w-p52w
  • free5gc Vendorfree5gc Affected before 4.2.2 Fixed in 4.2.2 Patch available CNA
  • github.com/free5gc/nef (Go) Vendor— Affected up to 1.2.3 Fixed in — No fix listed GHSA-rwww-x45w-p52w

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*before 4.2.2Vulnerablefree5gc
  • cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:* Versions before 4.2.2 Vulnerable ·free5gc

Remediation

  • Fix · CNA free5gc (free5gc) Fixed in 4.2.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-44330
  2. 2026-10-03 Alias added: GHSA-rwww-x45w-p52w

References

Exploit 1

Advisory 1

Other 2

  • TI-2026-32297 free5GC: SMF UPI management interface lacks auth middleware; unauthenticated topology read/write requests reach handlers CVSS 3.1CRITICAL 10.0
  • TI-2026-32295 free5GC: NEF nnef-oam route group is unauthenticated; no-token requests reach the OAM handler CVSS 3.1CRITICAL 10.0
  • TI-2025-39412 free5gc v4.1.0 and before is vulnerable to Buffer Overflow. CVSS 3.1CRITICAL 9.8
  • TI-2026-32294 Missing authorization in free5gc CVSS 3.1CRITICAL 9.4
  • TI-2026-32283 Missing authorization in free5gc CVSS 3.1CRITICAL 9.4
  • TI-2026-29042 free5gc UDR improper path validation allows unauthenticated creation and modification of Traffic Influence Subscriptions CVSS 4.0HIGH 8.7
See all 58 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences