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CVE-2026-33192 PUBLISHED CVSS 8.699999809265137 HIGH

Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. In versions prior to 1.4.2, the UDM incorrectly converts a downstream 400 Bad Request (from UDR) into a 500 Internal Server Error when handling PATCH requests with an empty supi path parameter. Additionally, the UDM incorrectly translates the PATCH method to PUT when forwarding to UDR, indicating a deeper architectural issue. This leaks internal error handling behavior, making it difficult for clients to distinguish between client-side errors and server-side failures. The issue has been patched in version 1.4.2.

EPSS 0.01% · 0.7th percentile

Risk Scores

CVSS v4.0
8.699999809265137
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS Score
0.01%
0.7th percentile

Affected Products

VendorProductVersions
free5gcfree5gc< 1.4.2, < 1.4.2
github.comfree5gc/udm0, 0
free5gcudm0, 0

Timeline

References

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