[ CVE-2026-116733 · Published 26 Oct 2026 ]
Vulnerability in dvidelabs flatcc
CVSS 3.7
EPSS <1%No fix listed yet
[ Why it matters ]Priority signals
- Public proof-of-concept exploit exists (CISA SSVC)
[ Description ]Official description
flatcc through 0.6.4 contains an out-of-bounds read vulnerability in __flatcc_json_parser_number that allows attackers to read past the input buffer via numbers ending in a decimal point. Attackers can supply untrusted JSON ending immediately after a decimal point to generated parsers, crashing applications when the buffer ends at an unmapped page.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ References ]References
- github.com/dvidelabs/flatcc
- github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/json_parser.c
- github.com/dvidelabs/flatcc/commit/356792dc155a9e685acdfe0ec1e209bdadcb4ab9
- hackmd.io/@haindpwn/flatcc-json-number-oob-read
- www.vulncheck.com/advisories/flatcc-through-0.6.4-out-of-bounds-read-via-flatcc-json-pa…
- hackmd.io/@haindpwn/cve-2026-116733-116734-flatcc-json-number-oob-read