CVE Explorer
CVE-2026-27643
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. Th
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"udr","vendor":"free5gc","versions":[{"status":"affected","version":"<= 1.4.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:4b36324c8a0c062ea9f9821bc1bb3d4539f8ee138e99b8176625ffb7e5958b66 · sha256:0fa9579ac6b0ee04… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.6,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:4b36324c8a0c062ea9f9821bc1bb3d4539f8ee138e99b8176625ffb7e5958b66 · sha256:0fa9579ac6b0ee04… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-209","description":"CWE-209: Generation of Error Message Containing Sensitive Information","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:4b36324c8a0c062ea9f9821bc1bb3d4539f8ee138e99b8176625ffb7e5958b66 · sha256:0fa9579ac6b0ee04… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/free5gc/free5gc/issues/753","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/free5gc/issues/753"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4b36324c8a0c062ea9f9821bc1bb3d4539f8ee138e99b8176625ffb7e5958b66 · sha256:0fa9579ac6b0ee04… · /containers/cna/references/1
{"name":"https://github.com/free5gc/free5gc/security/advisories/GHSA-6468-f87j-6g82","tags":["x_refsource_CONFIRM"],"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-6468-f87j-6g82"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4b36324c8a0c062ea9f9821bc1bb3d4539f8ee138e99b8176625ffb7e5958b66 · sha256:0fa9579ac6b0ee04… · /containers/cna/references/0
{"name":"https://github.com/free5gc/udr/commit/754d23b03755ad59077ed529ce3b971e477080c4","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/udr/commit/754d23b03755ad59077ed529ce3b971e477080c4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4b36324c8a0c062ea9f9821bc1bb3d4539f8ee138e99b8176625ffb7e5958b66 · sha256:0fa9579ac6b0ee04… · /containers/cna/references/3
{"name":"https://github.com/free5gc/udr/pull/56","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/udr/pull/56"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:4b36324c8a0c062ea9f9821bc1bb3d4539f8ee138e99b8176625ffb7e5958b66 · sha256:0fa9579ac6b0ee04… · /containers/cna/references/2
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.