{"action":"Upgrade github.com/free5gc/free5gc to 4.2.2 or later.","affected":[{"fixed":"4.2.2","introduced":"0"}],"component":"github.com/free5gc/free5gc","cve_ids":["CVE-2026-53551"],"ecosystem":"Go","epss":0.00737,"exploited":false,"fixed_versions":["4.2.2"],"ghsa_id":"GHSA-qj55-47fp-p62j","id":"tcs_01M5KFK3MA3MWKBFAT8R35M7BM","modified_at":"2026-08-18T15:10:46.494283172Z","published_at":"2026-07-31T20:13:11Z","references":["https://osv.dev/vulnerability/GHSA-qj55-47fp-p62j","https://github.com/free5gc/free5gc/security/advisories/GHSA-qj55-47fp-p62j","https://github.com/free5gc/free5gc/issues/1048","https://github.com/free5gc/ausf/pull/61","https://github.com/free5gc/ausf/commit/bfc4a10094dbacbd862baa4686829f3fcc06ce1e","https://github.com/free5gc/ausf/releases/tag/v1.4.5","https://github.com/free5gc/free5gc","https://github.com/free5gc/free5gc/releases/tag/v4.2.2"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-qj55-47fp-p62j","url":"https://osv.dev/vulnerability/GHSA-qj55-47fp-p62j"}],"summary":"free5GC AUSF: null byte injection in supiOrSuci causes HTTP 500 internal service failure"}