Description

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/udm pull request 75 contains a fix for the issue. No direct workaround is available at the application level. Applying the official patch is recommended.

INFO

Published Date :

2026-02-24T00:18:56.360Z

Last Modified :

2026-02-26T14:33:35.020Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-27642 vulnerability.

Vendors Products
Free5gc
  • Udm
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-27642.

URL Resource
https://github.com/free5gc/free5gc/issues/749 cve-icon cve-icon
https://github.com/free5gc/free5gc/security/advisories/GHSA-h4wg-rp7m-8xx4 cve-icon cve-icon
https://github.com/free5gc/udm/commit/a7af2321ddea6368c43835f90f6d1b9d67dd2ea1 cve-icon cve-icon
https://github.com/free5gc/udm/pull/75 cve-icon cve-icon
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CVSS Vulnerability Scoring System

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Detailed values of each vector for above chart.
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