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CVE-2026-33062

free5GC is an open source 5G core network.

Published Mar 20, 2026 · updated Jun 17, 2026 · free5gc free5gc

free5GC is an open source 5G core network. free5GC NRF prior to version 1.4.2 has an Improper Input Validation vulnerability leading to Denial of Service. All deployments of free5GC using the NRF discovery service are affected. The function attempts to access array indices [0], [1], [2] without validating the length of the split data. When the parameter contains insufficient separator characters, the code panics with "index out of range". A remote attacker can cause the NRF service to panic and crash by sending a crafted HTTP GET request with a malformed parameter. This results in complete denial of service for the NRF discovery service. free5GC NRF version 1.4.2 fixes the issue. There is no direct workaround at the application level. The recommendation is to apply the provided patch or restrict access to the NRF API to trusted sources only.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 20, 2026 · NIST NVD

    Detected

    free5GC is an open source 5G core network. free5GC NRF prior to version 1.4.2 has an Improper Input Validation vulnerability leading to Denial of Service. All deployments of free5GC using the NRF discovery service are affected. The function attempts to access array indices [0], [1], [2] without validating the length of the split data. When the parameter contains insufficient separator characters,

  2. Jun 17, 2026 · NIST NVD

    Updated

    free5GC is an open source 5G core network. free5GC NRF prior to version 1.4.2 has an Improper Input Validation vulnerability leading to Denial of Service. All deployments of free5GC using the NRF discovery service are affected. The function attempts to access array indices [0], [1], [2] without validating the length of the split data. When the parameter contains insufficient separator characters,

Affected

  • cpe free5gc/free5gcversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-33062

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-33062

    free5GC is an open source 5G core network. free5GC NRF prior to version 1.4.2 has an Improper Input Validation vulnerability leading to Denial of Service. All deployments of free5GC using the NRF discovery service are affected. The function attempts to access arra

    nvd.nist.gov

References