{"id":"CVE-2026-88344","title":"An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e","summary":"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 deref…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-22"],"published":"2026-09-22","updated":"2026-09-24","sourceUpdated":"2026-09-24T21:16:28.120","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-88344","references":[{"url":"https://github.com/dvidelabs/flatcc/issues/384","label":"cve@mitre.org"},{"url":"https://github.com/jimjag/flatcc/commit/c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e","label":"cve@mitre.org"},{"url":"https://github.com/dvidelabs/flatcc/issues/384","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org"],"epss":0.00405,"epssPercentile":0.32065,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-09-23T12:01:00.498513Z"},"ingestedAt":"2026-09-22T20:10:15.098Z","slug":"CVE-2026-88344","body":"## Overview\n\nAn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":209656,"id":"CVE-2026-88344","ts":1790166278682,"field":"cvss","old":null,"new":"7.5"},{"seq":209655,"id":"CVE-2026-88344","ts":1790166278682,"field":"severity","old":"none","new":"high"}]}