CVE-2026-116733: medium-severity vulnerability in dvidelabs flatcc
flatcc through 0.6.4 Out-of-Bounds Read via __flatcc_json_parser_number
Published · Updated
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33Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 6.3epss 0.4%
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Affected products
dvidelabs · flatccpublic PoCs found — 1
cve_referencehackmd.io/@haindpwn/cve-2026-116733-116734-flatcc-json-number-oob-readunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
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References
https://github.com/dvidelabs/flatcchttps://github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/json_parser.c#L539-L543https://github.com/dvidelabs/flatcc/commit/356792dc155a9e685acdfe0ec1e209bdadcb4ab9https://hackmd.io/@haindpwn/cve-2026-116733-116734-flatcc-json-number-oob-readhttps://hackmd.io/@haindpwn/flatcc-json-number-oob-readhttps://www.vulncheck.com/advisories/flatcc-through-0.6.4-out-of-bounds-read-via-flatcc-json-parser-number