{"id":"CVE-2026-78156","summary":"Open5GS S6a Authentication-Information-Request hss-s6a-path.c hss_ogs_diam_s6a_air_cb heap-based overflow","details":"A security vulnerability has been detected in Open5GS 2.8.0. Affected by this issue is the function hss_ogs_diam_s6a_air_cb of the file src/hss/hss-s6a-path.c of the component S6a Authentication-Information-Request Handler. Such manipulation of the argument Visited-PLMN-Id leads to heap-based buffer overflow. The attack may be performed from remote. The name of the patch is a9c82ee0b590d76a581b0580cb46b598984e2392. A patch should be applied to remediate this issue.","modified":"2026-08-28T14:33:08.235171Z","published":"2026-08-23T23:45:09.676Z","database_specific":{"cna_assigner":"VulDB","cwe_ids":["CWE-119","CWE-122"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78156.json"},"references":[{"type":"WEB","url":"https://github.com/open5gs/open5gs/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78156.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-78156"},{"type":"ADVISORY","url":"https://vuldb.com/cve/CVE-2026-78156"},{"type":"ADVISORY","url":"https://vuldb.com/submit/882951"},{"type":"ADVISORY","url":"https://vuldb.com/vuln/394539"},{"type":"REPORT","url":"https://github.com/open5gs/open5gs/issues/4661"},{"type":"REPORT","url":"https://vuldb.com/vuln/394539/cti"},{"type":"FIX","url":"https://github.com/open5gs/open5gs/commit/a9c82ee0b590d76a581b0580cb46b598984e2392"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/open5gs/open5gs","events":[{"introduced":"157f611a530e292e40ec50f9d23f0ef5d4fcd6a6"},{"fixed":"a9c82ee0b590d76a581b0580cb46b598984e2392"}],"database_specific":{"extracted_events":[{"introduced":"2.8.0"},{"last_affected":"2.8.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["2.8.0","v2.8.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78156.json","vanir_signatures_modified":"2026-08-28T14:33:08Z","vanir_signatures":[{"deprecated":false,"digest":{"function_hash":"45464812951928575338228865315835797047","length":8650},"id":"CVE-2026-78156-51fef699","signature_type":"Function","signature_version":"v1","source":"https://github.com/open5gs/open5gs/commit/a9c82ee0b590d76a581b0580cb46b598984e2392","target":{"file":"src/hss/hss-s6a-path.c","function":"hss_ogs_diam_s6a_air_cb"}},{"source":"https://github.com/open5gs/open5gs/commit/a9c82ee0b590d76a581b0580cb46b598984e2392","target":{"file":"src/hss/hss-s6a-path.c"},"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["181562297812172714094757837674189041500","280608706871569464997531268392152434205","67445969767720346783620262027047762357","335586561701890612679618581176031040271","63364199899361922927745716383322094646","60678863165849920517673359203133975129","124669432836315908818519177920041457474","137084497811222848774838788039007936153","190869654140963855040566689815114242291"]},"id":"CVE-2026-78156-653c6d63","signature_type":"Line","signature_version":"v1"}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P"}]}