CVE-2026-27643
mediumpriority · track · 21EPSS 0.003 · 24 %ileEUUSEPSS · scored 2026-10-28
free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, the NEF component reliably leaks internal parsing error details (e.g., invalid character 'n' after top-level value) to remote clients, which can aid attackers in service fingerprinting. All deployments of free5GC using the Nnef_PfdManagement service may be affected. free5gc/udr pull request 56 contains a patch for the issue. There is no direct workaround at the application level. The recommendation is to apply the provided patch.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (2)
Products and version ranges known to be affected.
also known as (2)
Other names and identifiers for this entity.
sources
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references (13)
External citations — patches, advisories, analysis.
- https://github.com/free5gc/free5gc/issues/753cnnvd
- https://github.com/free5gc/free5gc/security/advisories/GHSA-6468-f87j-6g82cnnvd
- https://github.com/free5gc/udr/commit/754d23b03755ad59077ed529ce3b971e477080c4cnnvd
- https://github.com/free5gc/udr/pull/56cnnvd
- https://github.com/free5gc/udr/releasesPatchcnnvd
- https://github.com/free5gc/free5gc/issues/753enisa_euvd
- https://github.com/free5gc/free5gc/security/advisories/GHSA-6468-f87j-6g82enisa_euvd
- https://github.com/free5gc/udr/commit/754d23b03755ad59077ed529ce3b971e477080c4enisa_euvd
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