CVE Explorer
CVE-2026-27642
free5gc UDM provides Unified Data Management (UDM) for free5GC, an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, remote attackers can inject control characters (e.g., %00) into the supi parameter, triggering internal URL parsing errors (net/url: invalid control character). This exposes system-level error details and can be used for service fingerprinting. All deployments of free5GC using the UDM Nudm_UEAU service may be affected. free5gc
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"product":"udm","vendor":"free5gc","versions":[{"status":"affected","version":"<= 1.4.1"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:e8882be92d0721bfe3f152276189e2b85ae7f314d5fbd10a2747405eeabfae0b · sha256:31c92ffd3fcde2c7… · /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:e8882be92d0721bfe3f152276189e2b85ae7f314d5fbd10a2747405eeabfae0b · sha256:31c92ffd3fcde2c7… · /containers/cna/metrics/0/cvssV4_0
CWE assertions
1 source assertion{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:e8882be92d0721bfe3f152276189e2b85ae7f314d5fbd10a2747405eeabfae0b · sha256:31c92ffd3fcde2c7… · /containers/cna/problemTypes/0/descriptions/0
Source references
4 source assertions{"name":"https://github.com/free5gc/free5gc/issues/749","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/free5gc/issues/749"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e8882be92d0721bfe3f152276189e2b85ae7f314d5fbd10a2747405eeabfae0b · sha256:31c92ffd3fcde2c7… · /containers/cna/references/1
{"name":"https://github.com/free5gc/free5gc/security/advisories/GHSA-h4wg-rp7m-8xx4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-h4wg-rp7m-8xx4"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e8882be92d0721bfe3f152276189e2b85ae7f314d5fbd10a2747405eeabfae0b · sha256:31c92ffd3fcde2c7… · /containers/cna/references/0
{"name":"https://github.com/free5gc/udm/commit/a7af2321ddea6368c43835f90f6d1b9d67dd2ea1","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/udm/commit/a7af2321ddea6368c43835f90f6d1b9d67dd2ea1"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e8882be92d0721bfe3f152276189e2b85ae7f314d5fbd10a2747405eeabfae0b · sha256:31c92ffd3fcde2c7… · /containers/cna/references/3
{"name":"https://github.com/free5gc/udm/pull/75","tags":["x_refsource_MISC"],"url":"https://github.com/free5gc/udm/pull/75"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:e8882be92d0721bfe3f152276189e2b85ae7f314d5fbd10a2747405eeabfae0b · sha256:31c92ffd3fcde2c7… · /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.