Secuno
ENNL
Book demo

CVE-2026-44326

Free5gc broken access control

9.4 CRITICALPublic exploitEPSS 0.53%
  1. Published27 May 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityLow
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H

Affected products

Free5gc< 4.2.2

Remediation

Fixed in
Free5gc≥ 4.2.2

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-891089.1
SAP Manufacturing Integration and Intelligence does not sufficiently enforce…
CVE-2026-1096408.1
Frappe ERPNext before 16.22.0 contains a missing authorization vulnerability that…
CVE-2026-843158.3
Nginx UI is a web user interface for the Nginx web server. Prior to 2.4.1, Nginx UI…
CVE-2026-571189.8
PraisonAI is a multi-agent teams system. Prior to praisonaiagents 1.6.59,…
CVE-2026-1092018.3
LogicalDOC Community Edition through 9.3 contains a missing authorization vulnerability…
CVE-2026-1091858.8
jshERP through 3.6 contains a missing authorization vulnerability in the UserController…

Frequently asked

Is CVE-2026-44326 being actively exploited?

CVE-2026-44326 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.53%.

How severe is CVE-2026-44326?

CVE-2026-44326 has a CVSS 3.1 base score of 9.4, rated critical. EPSS estimates a 0.53% probability of exploitation.

Which products are affected by CVE-2026-44326?

Affected products include Free5gc.

How do I fix CVE-2026-44326?

Upgrade affected software to a fixed version, for example Free5gc 4.2.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-44326 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.