CVE-2026-44326

9.4 CRITICAL 0.3% exploit odds Fix listed Auth & access

What it is

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the 3gpp-traffic-influence API without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can create, read, patch, and delete traffic-influence subscriptions either with no Authorization header at all, or with a forged bearer token (e.g. Authorization: Bearer not-a-real-token). This includes creating AnyUeInd=true subscriptions intended to affect group / any-UE traffic steering. The route group is also reachable even when the running config's ServiceList does not declare it, so operators who think they disabled the service via config are still exposed. This vulnerability is fixed in 4.2.2.

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data tampering, service disruption.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-05-27 17:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-14 20:10 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.3% in the next 30 days (EPSS).
Severity: 9.4 CRITICAL (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2026-05-27 17:16 UTC
Last modified: 2026-10-14 20:10 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-862 · Missing authorization
Record status: Analyzed

Affected

free5gc < 4.2.2

Attack profile CVSS 3.1 · 9.4

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record