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CVE-2026-44327

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-oam route group without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can hit the OAM route with no Authorization header at all and the handler returns 200 OK. The current OAM handler is a stub that returns null, but the structural defect is route-group-scoped: the entire OAM route group has no inbound auth middleware, so every future OAM ope
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:0c6f4c03690c9953fea1763f88fa6a5eb001ce372cde0d440611d38df7dc53be
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"free5gc","vendor":"free5gc","versions":[{"status":"affected","version":"< 4.2.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":10,"baseSeverity":"CRITICAL","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-306","description":"CWE-306: Missing Authentication for Critical Function","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-862","description":"CWE-862: Missing Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/cna/problemTypes/1/descriptions/0

Source references

4 source assertions
{"name":"https://github.com/free5gc/free5gc/issues/861","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/free5gc/issues/861"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-cmpj-2x3g-m7g3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/adp/0/references/0
{"name":"https://github.com/free5gc/free5gc/security/advisories/GHSA-cmpj-2x3g-m7g3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-cmpj-2x3g-m7g3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /containers/cna/references/0
{"name":"https://github.com/free5gc/nef/pull/23","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/nef/pull/23"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:515fc96720857b732351b6bed2e7862b719e0b869ab1c5fb62c3f0d9025e0222 · sha256:fff80119c0eac6cc… · /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.

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