CVE-2026-88344

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Published 2026-09-22. Last modified 2026-09-24.