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.
Advisories

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Fixes

Solution

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Workaround

No workaround given by the vendor.

History

Tue, 27 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
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.
Title flatcc through 0.6.4 Out-of-Bounds Read via __flatcc_json_parser_number
First Time appeared Flatcc Project
Flatcc Project flatcc
Weaknesses CWE-125
CPEs cpe:2.3:a:flatcc_project:flatcc:*:*:*:*:*:*:*:*
Vendors & Products Flatcc Project
Flatcc Project flatcc
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

cvssV4_0

{'score': 6.3, '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-26T21:52:34.304Z

Reserved: 2026-10-26T20:23:35.412Z

Link: CVE-2026-116733

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-26T22:16:57.360

Modified: 2026-10-26T22:16:57.483

Link: CVE-2026-116733

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-27T08:15:15Z

Weaknesses