free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the free5GC UDM component fails to validate the supi path parameter in six GET handlers of the nudm-sdm (Subscriber Data Management) service. An unauthenticated attacker can inject control characters into the SUPI parameter, causing UDM to forward a malformed request to UDR and return a 500 Internal Server Error response that exposes internal infrastructure details. This vulnerability is fixed in 4.2.2.
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History
Thu, 28 May 2026 18:45:00 +0000
| Type | Values Removed | Values Added |
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| CPEs | cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:* | |
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cvssV3_1
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Thu, 28 May 2026 15:30:00 +0000
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ssvc
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Thu, 28 May 2026 03:45:00 +0000
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Free5gc
Free5gc free5gc |
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| Vendors & Products |
Free5gc
Free5gc free5gc |
Wed, 27 May 2026 16:30:00 +0000
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| Description | free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, the free5GC UDM component fails to validate the supi path parameter in six GET handlers of the nudm-sdm (Subscriber Data Management) service. An unauthenticated attacker can inject control characters into the SUPI parameter, causing UDM to forward a malformed request to UDR and return a 500 Internal Server Error response that exposes internal infrastructure details. This vulnerability is fixed in 4.2.2. | |
| Title | free5GC: Improper Input Validation and Generation of Error Message Containing Sensitive Information in github.com/free5gc/udm | |
| Weaknesses | CWE-20 CWE-209 |
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cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-05-27T15:53:45.452Z
Updated: 2026-05-28T14:14:46.406Z
Reserved: 2026-04-27T13:55:58.694Z
Link: CVE-2026-42459
Updated: 2026-05-28T14:14:31.540Z
Status : Analyzed
Published: 2026-05-27T17:16:35.593
Modified: 2026-05-28T18:35:51.610
Link: CVE-2026-42459
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