Vulnerability DatabaseCVE-2026-116733
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CVE-2026-116733
Published:October 26, 2026
Updated:November 03, 2026
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.
Related Resources (8)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/116xxx/CVE-2026-116733.json
https://hackmd.io/@haindpwn/flatcc-json-number-oob-read
https://nvd.nist.gov/vuln/detail/CVE-2026-116733
https://hackmd.io/@haindpwn/cve-2026-116733-116734-flatcc-json-number-oob-read
https://github.com/dvidelabs/flatcc/commit/356792dc155a9e685acdfe0ec1e209bdadcb4ab9
https://github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/json_parser.c#L539-L543
https://www.vulncheck.com/advisories/flatcc-through-0.6.4-out-of-bounds-read-via-flatcc-json-parser-number
https://github.com/dvidelabs/flatcc
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CVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Out-of-bounds Read
CWE-125
EPSS
Base Score:
0.42