Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L L N U N L L 5.4 .0025 16.8 —
AFFECTED Product Versions Fixed free5gc < 4.2.2 – —
TIMELINE Apr 23 Reserved by GitHub_M May 27 EXPLOIT PUBLISHED — CVE-2026-42082 (free5gc). Public exploit reference added. May 27 Published (CNA: GitHub_M)
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the AMF in Free5GC does not enforce the concurrent security procedure rules defined in 3GPP TS 33.501 §6.9.5.1. The AMF does not check for ongoing N2 handover procedures before initiating a NAS Security Mode Command, and vice versa. This can lead to mismatches between NAS and AS security contexts in the network and the UE. This vulnerability is fixed in 4.2.2.
| Date | Event | Detail |
|---|---|---|
| April 23, 2026 | Reserved | Reserved by GitHub_M |
| May 27, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-42082 (free5gc). Public exploit reference added. |
| May 27, 2026 | Published | Published (CNA: GitHub_M) |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| free5gc | free5gc | — | < 4.2.2 | — |
Authoritative record: CVE-2026-42082 at cve.org
Vendors: free5gc
Weaknesses: CWE-358
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-42082 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.