{"id":"CVE-2026-116734","title":"flatcc through 0.6.4 Out-of-Bounds Read via verifier check_header","summary":"flatcc through 0.6.4 contains an integer overflow vulnerability in the check_header function of the FlatBuffers verifier because its overflow guard is dead code. On 32-bit builds, attackers can supply a crafted buffer offset that wraps t…","severity":"low","cvss":3.7,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-190"],"vendor":"dvidelabs","product":"flatcc","affected":["flatcc <= 0.6.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-27T13:42:01.742265Z"},"published":"2026-10-26","updated":"2026-10-27","sourceUpdated":"2026-10-27T14:17:08.680Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116734","references":[{"url":"https://github.com/dvidelabs/flatcc/commit/0df9c097a19badc8bd22d93af8fd47bd291e5d9f","label":"Patch Commit"},{"url":"https://github.com/dvidelabs/flatcc"},{"url":"https://github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/verifier.c#L126-L137"},{"url":"https://hackmd.io/@haindpwn/flatcc-json-number-oob-read"},{"url":"https://www.vulncheck.com/advisories/flatcc-through-0.6.4-out-of-bounds-read-via-verifier-check-header","label":"VulnCheck Advisory: flatcc through 0.6.4 Out-of-Bounds Read via verifier check_header"}],"tags":["cve.org"],"epss":0.00382,"epssPercentile":0.32039,"ingestedAt":"2026-10-27T16:11:59.454Z","slug":"CVE-2026-116734","body":"## Overview\n\nflatcc through 0.6.4 contains an integer overflow vulnerability in the check_header function of the FlatBuffers verifier because its overflow guard is dead code. On 32-bit builds, attackers can supply a crafted buffer offset that wraps the bounds check, causing an out-of-bounds read before the buffer and crashing the process.\n\n## Affected\n\n- `flatcc <= 0.6.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":20,"depthScoreParts":{"impact":20.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}