{"id":"CVE-2026-88345","details":"An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema ends with an unterminated quotation mark, the C-string scanning logic in lex() dereferences the input pointer after it has reached the end of the buffer. A specially crafted schema can trigger a one-byte heap buffer over-read, resulting in application crash and denial of service.","modified":"2026-09-24T08:26:15.866515Z","published":"2026-09-22T00:00:00Z","database_specific":{"cna_assigner":"mitre","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88345.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88345.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88345"},{"type":"REPORT","url":"https://github.com/dvidelabs/flatcc/issues/385"},{"type":"FIX","url":"https://github.com/jimjag/flatcc/commit/8581715e8ec4e5de8eea9fd6dad949e4dd7d0fa0"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jimjag/flatcc","events":[{"introduced":"0"},{"fixed":"8581715e8ec4e5de8eea9fd6dad949e4dd7d0fa0"}],"database_specific":{"source":"REFERENCES"}}],"versions":["v0.6.0","v0.5.3","v0.5.2","v0.5.1","v0.5.0","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.5a","v0.3.5","v0.3.4","v0.3.3","v0.3.2","v0.3.1","v0.3.0","v0.2.1","v0.2.0","v0.1.1","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88345.json","vanir_signatures_modified":"2026-09-24T08:26:15Z","vanir_signatures":[{"source":"https://github.com/jimjag/flatcc/commit/8581715e8ec4e5de8eea9fd6dad949e4dd7d0fa0","target":{"file":"external/lex/luthor.c","function":"lex"},"deprecated":false,"digest":{"function_hash":"140745542203207057967600546310812658835","length":18202},"id":"CVE-2026-88345-64a435b2","signature_type":"Function","signature_version":"v1"},{"signature_version":"v1","source":"https://github.com/jimjag/flatcc/commit/8581715e8ec4e5de8eea9fd6dad949e4dd7d0fa0","target":{"file":"external/lex/luthor.c"},"deprecated":false,"digest":{"line_hashes":["192154736179084535940285208283402335506","189758180693956896102618705817941165189","291927434774147814907381266111894925547","114905508030135431398108895865507993457","35200088507735539924784853764467794384","59384815895195755758989529845499141338","93523947146654348610591918950745400167","327517114523189634063938539365658870220","333916811758164838247585918942177958953","51049710225825284417409462250394150299","303204673908176598688439926565812054816","126564703287651739028712536449990256161","240981646419060854162087877878386343292"],"threshold":0.9},"id":"CVE-2026-88345-b6d0062e","signature_type":"Line"}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}