{"id":"CVE-2026-116733","state":"PUBLISHED","title":"flatcc through 0.6.4 Out-of-Bounds Read via __flatcc_json_parser_number","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.","publishedAt":"2026-10-26T21:52:34.304Z","updatedAt":"2026-10-26T21:52:34.304Z","severity":{"score":6.3,"label":"Medium","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["dvidelabs flatcc"],"affected":[{"vendor":"dvidelabs","product":"flatcc","packageURL":"pkg:github/dvidelabs/flatcc","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.6.4","versionType":"custom"}],"repo":"https://github.com/dvidelabs/flatcc"}],"references":["https://github.com/dvidelabs/flatcc/commit/356792dc155a9e685acdfe0ec1e209bdadcb4ab9","https://github.com/dvidelabs/flatcc","https://github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/json_parser.c#L539-L543","https://hackmd.io/@haindpwn/flatcc-json-number-oob-read","https://www.vulncheck.com/advisories/flatcc-through-0.6.4-out-of-bounds-read-via-flatcc-json-parser-number"],"weaknesses":["CWE-125"],"ingestedAt":"2026-10-29T20:10:43.281Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/116xxx/CVE-2026-116733.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-116733","state":"PUBLISHED","datePublished":"2026-10-26T21:52:34.304Z","dateUpdated":"2026-10-26T21:52:34.304Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-10-26T20:23:35.412Z"},"containers":{"cna":{"title":"flatcc through 0.6.4 Out-of-Bounds Read via __flatcc_json_parser_number","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"dvidelabs","product":"flatcc","packageURL":"pkg:github/dvidelabs/flatcc","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.6.4","versionType":"custom"}],"repo":"https://github.com/dvidelabs/flatcc"}],"references":[{"url":"https://github.com/dvidelabs/flatcc/commit/356792dc155a9e685acdfe0ec1e209bdadcb4ab9","tags":["patch"],"name":"Patch Commit"},{"url":"https://github.com/dvidelabs/flatcc","tags":["product"]},{"url":"https://github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/json_parser.c#L539-L543","tags":["technical-description"]},{"url":"https://hackmd.io/@haindpwn/flatcc-json-number-oob-read","tags":["third-party-advisory"]},{"url":"https://www.vulncheck.com/advisories/flatcc-through-0.6.4-out-of-bounds-read-via-flatcc-json-parser-number","name":"VulnCheck Advisory: flatcc through 0.6.4 Out-of-Bounds Read via __flatcc_json_parser_number","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW","baseScore":3.7,"baseSeverity":"LOW"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"Out-of-bounds Read","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-10-26T21:52:34.304Z"},"datePublic":"2026-10-22T00:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:flatcc_project:flatcc:*:*:*:*:*:*:*:*","versionEndIncluding":"0.6.4"}]}]}],"credits":[{"lang":"en","value":"HaiND from the Post and Telecommunication Institute of Technology","type":"finder"},{"lang":"en","value":"mikkelfj","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}}}}}