{"id":"CVE-2026-88344","details":"An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema buffer ends with a digit, the integer digit-scan loop in lex() advances past the end of the input buffer and dereferences the out-of-bounds pointer. A specially crafted schema can trigger a one-byte heap buffer over-read, resulting in application crash and denial of service.","modified":"2026-10-28T11:19:12.974586626Z","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-2026-88344.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/88xxx/CVE-2026-88344.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88344"},{"type":"REPORT","url":"https://github.com/dvidelabs/flatcc/issues/384"},{"type":"FIX","url":"https://github.com/jimjag/flatcc/commit/c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/jimjag/flatcc","events":[{"introduced":"0"},{"fixed":"c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e"}],"database_specific":{"extracted_events":[{"source":"REFERENCES_COMMIT","range":[{"fixed":"c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e"}]}]}}],"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":{"vanir_signatures_modified":"2026-10-28T11:19:12Z","source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-88344.json","vanir_signatures":[{"signature_version":"v1","source":"https://github.com/jimjag/flatcc/commit/c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e","target":{"file":"external/lex/luthor.c"},"deprecated":false,"digest":{"line_hashes":["298537850230673638645543380304689417130","58619515365624421221682272334695859297","62332699828865659022552210106442614114","229420838458747172363751533671299833382","338858592964460302613713744072750996067","136035547772697195397112517437463071076","170432091886214889760605210489107662067"],"threshold":0.9},"id":"CVE-2026-88344-104a7b47","signature_type":"Line"},{"signature_type":"Function","signature_version":"v1","source":"https://github.com/jimjag/flatcc/commit/c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e","target":{"file":"external/lex/luthor.c","function":"lex"},"deprecated":false,"digest":{"length":18181,"function_hash":"133517690763862963477684952232871599946"},"id":"CVE-2026-88344-60932eb1"}]}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}