High 8.7Published Mar 19, 2026

CVE-2026-33062free5GC NRF Discovery EncodeGroupId Function Panics on Malformed group-id-list Parameter

Updated under an hour ago (Oct 27, 2026, 3:23 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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 `EncodeGroupId` 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 `group-id-list` 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.

CVSS: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-284
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

free5gc nrf free5gc:nrf (from the name)	before 1.4.2	CNA record
free5gc free5gc free5gc:free5gc	before 1.4.2	NVD

References

References

https://github.com/free5gc/free5gc/security/advisories/GHSA-7c47-xr7q-p6hg	x-refsource-confirm, vendor-advisory
https://github.com/free5gc/free5gc/issues/777	x-refsource-misc, exploit, issue-tracking
https://github.com/free5gc/nrf/pull/80	x-refsource-misc, patch
https://github.com/free5gc/nrf/commit/dac77d8f8f2e0f041c5634fb3c685dcb9734b872	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.