CVE Explorer

CVE-2026-40249

free5GC is an open-source implementation of the 5G core network. In versions 4.2.1 and below of the UDR service, the PUT handler for updating Policy Data notification subscriptions at /nudr-dr/v2/policy-data/subs-to-notify/{subsId} does not return after request body retrieval or deserialization errors. Although HTTP 500 or 400 error responses are sent, execution continues and the processor is invoked with a potentially uninitialized or partially initialized PolicyDataSubscription object. This fa

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:61b20d372b5ff639a2bb757ce03f718f584ca52d7d7f6ded9779449ab36ff465

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-754","description":"CWE-754: Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:f8937d03f800ce6815b2bd8b9341bd573cdf20c74aaf36c5fd6e61884c0dcaa2 · sha256:e4ef1b887e752bd4… · /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:f8937d03f800ce6815b2bd8b9341bd573cdf20c74aaf36c5fd6e61884c0dcaa2 · sha256:e4ef1b887e752bd4… · /containers/cna/problemTypes/1/descriptions/0

Affected products and versions

1 source assertion

{"product":"free5gc","vendor":"free5gc","versions":[{"status":"affected","version":"<= 4.2.1"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:f8937d03f800ce6815b2bd8b9341bd573cdf20c74aaf36c5fd6e61884c0dcaa2 · sha256:e4ef1b887e752bd4… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":6.9,"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:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:f8937d03f800ce6815b2bd8b9341bd573cdf20c74aaf36c5fd6e61884c0dcaa2 · sha256:e4ef1b887e752bd4… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions

{"cweId":"CWE-754","description":"CWE-754: Improper Check for Unusual or Exceptional Conditions","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:f8937d03f800ce6815b2bd8b9341bd573cdf20c74aaf36c5fd6e61884c0dcaa2 · sha256:e4ef1b887e752bd4… · /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:f8937d03f800ce6815b2bd8b9341bd573cdf20c74aaf36c5fd6e61884c0dcaa2 · sha256:e4ef1b887e752bd4… · /containers/cna/problemTypes/1/descriptions/0

Source references

1 source assertion

{"name":"https://github.com/free5gc/free5gc/security/advisories/GHSA-gx38-8h33-pmxr","tags":["x_refsource_CONFIRM"],"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-gx38-8h33-pmxr"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:f8937d03f800ce6815b2bd8b9341bd573cdf20c74aaf36c5fd6e61884c0dcaa2 · sha256:e4ef1b887e752bd4… · /containers/cna/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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