free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without inbound OAuth2 middleware. On top of that, the DELETE /upi/v1/upNodesLinks/{upNodeRef} handler unco…
Exact source revision recorded 9 Nov 2026 11:03:53 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-32570
Publishedfree5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without inbound OAuth2 middleware. On top of that, the DELETE /upi/v1/upNodesLinks/{upNodeRef} handler unconditionally dereferences upNode.UPF after the type-guarded async release, even though AN-typed nodes are constructed without a UPF object. As a result, a single unauthenticated DELETE /upi/v1/upNodesLinks/gNB1 request crashes the handler with a nil-pointer panic AND mutates the in-memory user-plane topology before panicking (the UpNodeDelete(upNodeRef) line runs first). This is an unauthenticated, state-mutating panic-DoS sink that an off-path network attacker can trigger by name against any AN entry. This vulnerability is fixed in 4.2.2.
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Original publisher date fields
datePublished: May 27, 2026, 3:39:44 PM
dateUpdated: May 27, 2026, 5:42:00 PM
- Source published
- May 27, 2026, 3:39:44 PM (timezone not stated)
- Source modified
- May 27, 2026, 5:42:00 PM (timezone not stated)
- Observed here
- 9 Nov 2026 11:03:53 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
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EUVD CVSS 3.1 · 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H