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CVE-2026-40248

free5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the handler for creating or updating Traffic Influence Subscriptions checks whether the influenceId path segment equals subs-to-notify, but does not return after sending the HTTP 404 response when validation fails. Execution continues and the subscription is created or overwritten regardless. An unauthenticated attacker with access to the 5G Service Based Interface can create or overw
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c887790d593d7683ba195f78b6256c4b53fbb6c7335bc53dddaf465d43550462
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-285","description":"CWE-285: Improper Authorization","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1919f1231bcbbc0d801c8a932988b3bd1fbc5357fe8157813084276cd7b8019f · sha256:faff6f8261ef1861… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-636","description":"CWE-636: Not Failing Securely ('Failing Open')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1919f1231bcbbc0d801c8a932988b3bd1fbc5357fe8157813084276cd7b8019f · sha256:faff6f8261ef1861… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion
{"product":"free5gc","vendor":"free5gc","versions":[{"status":"affected","version":"<= 1.4.2"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1919f1231bcbbc0d801c8a932988b3bd1fbc5357fe8157813084276cd7b8019f · sha256:faff6f8261ef1861… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","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:N/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1919f1231bcbbc0d801c8a932988b3bd1fbc5357fe8157813084276cd7b8019f · sha256:faff6f8261ef1861… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-285","description":"CWE-285: Improper Authorization","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1919f1231bcbbc0d801c8a932988b3bd1fbc5357fe8157813084276cd7b8019f · sha256:faff6f8261ef1861… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-636","description":"CWE-636: Not Failing Securely ('Failing Open')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1919f1231bcbbc0d801c8a932988b3bd1fbc5357fe8157813084276cd7b8019f · sha256:faff6f8261ef1861… · /containers/cna/problemTypes/1/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/free5gc/free5gc/security/advisories/GHSA-jgq2-qv8v-5cmj","tags":["x_refsource_CONFIRM"],"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-jgq2-qv8v-5cmj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1919f1231bcbbc0d801c8a932988b3bd1fbc5357fe8157813084276cd7b8019f · sha256:faff6f8261ef1861… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-jgq2-qv8v-5cmj"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1919f1231bcbbc0d801c8a932988b3bd1fbc5357fe8157813084276cd7b8019f · sha256:faff6f8261ef1861… · /containers/adp/0/references/0

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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