{"id":"CVE-2026-46411","summary":"FlashMQ: Client can trigger uncaught exception on FlashMQ 1.26.1 and older","details":"FlashMQ is a MQTT broker/server, designed for multi-CPU environments. Prior to version 1.26.2, authorized clients have the ability to exceed the permitted over-commit of their write buffer and triggering an internal safe-guard exception. This exception was in a path that was not catchable, and therefore causes a server abort. This issue has been patched in version 1.26.2.","aliases":["GHSA-g35r-265r-rxrh"],"modified":"2026-08-12T16:09:38.129Z","published":"2026-06-09T23:01:33.212Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-248"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46411.json"},"references":[{"type":"WEB","url":"https://github.com/halfgaar/FlashMQ/releases/tag/v1.26.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46411.json"},{"type":"ADVISORY","url":"https://github.com/halfgaar/FlashMQ/security/advisories/GHSA-g35r-265r-rxrh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46411"},{"type":"FIX","url":"https://github.com/halfgaar/FlashMQ/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/halfgaar/flashmq","events":[{"introduced":"0"},{"fixed":"29e08f7b97b6e3f96db923c2b6a260c47b49c195"},{"fixed":"128a1ff0e926ead1ea9dfa287f2188fdf1f0c8d6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"1.26.2"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["v1.26.1","v1.26.0","v1.25.0","v1.24.0","v1.23.0","v1.22.0","v1.21.1","v1.21.0","v1.20.0","v1.19.0","v1.18.2","v1.18.1","v1.18.0","v1.17.2","v1.17.1","v1.17.0","v1.16.0","v1.15.4","v1.15.3","v1.15.2","v1.15.1","v1.15.0","v1.14.0","v1.13.1","v1.13.0","v1.12.1","v1.12.0","v1.11.0","v1.10.0","v1.9.1","v1.9.0","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.11","v1.7.10","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.9","v1.6.8","v1.6.7","v1.6.6","v1.6.5","v1.6.4","v1.6.3","v1.6.2","v1.6.1","v1.6.0","v1.5.0","v1.4.5","v1.4.4","v1.4.3","v1.4.2","v1.4.1","v1.4.0","v1.3.1","v1.3.0","v1.2.1","v1.2.0","v1.1.0","v1.0.2","v1.0.1","v1.0.0","v0.13.1","v0.13.0","v0.12.1","v0.12.0","v0.11.9","v0.11.8","v0.11.7","v0.11.6","v0.11.5","v0.11.4","v0.11.3","v0.11.2","v0.11.1","v0.11.0","v0.10.1","v0.10.0","v0.9.9","v0.9.8","v0.9.7","v0.9.6","v0.9.5","v0.9.4","v0.9.3","v0.9.2","v0.9.1","v0.9.0","v0.8.1","v0.8.0","v0.7.1","v0.7.0","v0.6.3","v0.6.1","v0.6.0","v0.5.2","v0.5.1","v0.5.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46411.json","vanir_signatures_modified":"2026-08-12T16:09:38Z","vanir_signatures":[{"deprecated":false,"digest":{"function_hash":"104759297526865035922781959606826516807","length":60},"id":"CVE-2026-46411-1a343c54","signature_type":"Function","signature_version":"v1","source":"https://github.com/halfgaar/flashmq/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195","target":{"file":"acksender.cpp","function":"AckSender::~AckSender"}},{"signature_version":"v1","source":"https://github.com/halfgaar/flashmq/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195","target":{"file":"mqttpacket.cpp","function":"MqttPacket::handlePublish"},"deprecated":false,"digest":{"function_hash":"157703269453265119471034193753165056544","length":4381},"id":"CVE-2026-46411-22178f56","signature_type":"Function"},{"signature_type":"Function","signature_version":"v1","source":"https://github.com/halfgaar/flashmq/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195","target":{"file":"acksender.cpp","function":"AckSender::sendNow"},"deprecated":false,"digest":{"function_hash":"204712397164875279743955376352708707498","length":279},"id":"CVE-2026-46411-41ba23a8"},{"deprecated":false,"digest":{"line_hashes":["176157810532447771899058831611812443633","314622849686522003084419093633002490795","98870588133355330289873844956528095822","284303160097880722422588902864838130014","302115229388494512066478831879818725456","86582594774850423046124136839466134390","163690425225603615867309648835443304114","158914923746971056635178057986373930086","288479185530027931591048738260798431549","144138023451486629503050147404414555476","288667836718689168695416196065040136549","271712356470419439884611897601149857081","109732023669935990366928053048864270192","302251187665272477398821637727878122957","61885674913127506371268330569877729755","89193558086023679838155539482619965076","6571640016441117663086114839871649198"],"threshold":0.9},"id":"CVE-2026-46411-b0bcf55e","signature_type":"Line","signature_version":"v1","source":"https://github.com/halfgaar/flashmq/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195","target":{"file":"acksender.cpp"}},{"deprecated":false,"digest":{"function_hash":"308321596184979552859739535090308623738","length":158},"id":"CVE-2026-46411-b4e8b1aa","signature_type":"Function","signature_version":"v1","source":"https://github.com/halfgaar/flashmq/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195","target":{"file":"acksender.cpp","function":"AckSender::AckSender"}},{"signature_version":"v1","source":"https://github.com/halfgaar/flashmq/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195","target":{"file":"mqttpacket.cpp"},"deprecated":false,"digest":{"line_hashes":["213363503978499751574937616342295389258","160011091593311782085408869903699645763","285945010866791510485041377277775258399","254069682845995625231912821364451608427","153238388919759776087831812145651526789","183159839025017707759768482842913357936","99053516425069262082069565479135553439","113622990904527076370223957448768157553","255859857550285640330228504507058733857","171033618745105640813168812429994593955","265865077867054237556121051151390854002","2682039253662295083715423303390958553","184499518917353253758069527326661918539","291009204430033454028870149134109995251","306761186308915361968289678385551200653","199608565309167049150136893166452573304","224967898780492590367865968696096314316","211498584948926275485626493477975786103","312847243722085978859735684387997723025","27858456300387824182522499130978780146","77736029953393641642396105270105436802","226346638579260776352799526341149625887"],"threshold":0.9},"id":"CVE-2026-46411-db23acde","signature_type":"Line"},{"signature_version":"v1","source":"https://github.com/halfgaar/flashmq/commit/29e08f7b97b6e3f96db923c2b6a260c47b49c195","target":{"file":"acksender.h"},"deprecated":false,"digest":{"line_hashes":["334588700048649463628635135887922529423","168620139688679201561784049917403665323","244448984000211969236304498662699358605","169672173804264513922578504077704623111","90228614859503689730536013833259877318","188785374733152737840604628051982496173","50795459626646480877159237258217434798","142028673282348831072613034878249121119","63605548537757037606504514135995239691","83659408263246801995990609144178026264","282583882310370531530571481407607986518","260232880620287174236423458750626285521","315975552275391799256613309386622700933","212625259221931583728936365803822758111","123528448351527163524354247933150340960"],"threshold":0.9},"id":"CVE-2026-46411-fda77b88","signature_type":"Line"}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}