{"schema_version":"1.7.5","id":"GHSA-7c47-xr7q-p6hg","published":"2026-03-18T20:05:31Z","modified":"2026-03-23T18:56:04.158991Z","aliases":["CVE-2026-33062","GO-2026-4756"],"summary":"free5GC NRF Discovery EncodeGroupId Function Panics on Malformed group-id-list Parameter","details":"**Impact**  \nThis is an Improper Input Validation vulnerability leading to Denial of Service.  \n- **Security Impact**: 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.  \n- **Functional Impact**: 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\".  \n- **Affected Parties**: All deployments of free5GC v4.0.1 using the NRF discovery service.\n\n**Patches**  \nYes, the issue has been patched.  \nThe fix is implemented in PR free5gc/nrf#80 (commit: [add fix reference here]).  \nUsers should upgrade to the next release of free5GC that includes this commit.\n\n**Workarounds**  \nThere 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.","affected":[{"package":{"name":"github.com/free5gc/nrf","ecosystem":"Go","purl":"pkg:golang/github.com/free5gc/nrf"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.4.2"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-7c47-xr7q-p6hg/GHSA-7c47-xr7q-p6hg.json"}}],"references":[{"type":"WEB","url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-7c47-xr7q-p6hg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33062"},{"type":"WEB","url":"https://github.com/free5gc/free5gc/issues/777"},{"type":"WEB","url":"https://github.com/free5gc/nrf/pull/80"},{"type":"WEB","url":"https://github.com/free5gc/nrf/commit/dac77d8f8f2e0f041c5634fb3c685dcb9734b872"},{"type":"PACKAGE","url":"https://github.com/free5gc/free5gc"}],"database_specific":{"cwe_ids":["CWE-284"],"github_reviewed":true,"github_reviewed_at":"2026-03-18T20:05:31Z","nvd_published_at":"2026-03-20T03:16:01Z","severity":"HIGH"},"severity":[{"type":"CVSS_V4","score":"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"}]}