{"id":"CVE-2026-116734","published":"2026-10-26T22:16:57.527","lastModified":"2026-10-26T22:16:57.637","description":"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 the bounds check, causing an out-of-bounds read before the buffer and crashing the process.","cvssScore":3.7,"cvssSeverity":"LOW","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-190"],"vendors":[],"products":[],"references":[{"url":"https://github.com/dvidelabs/flatcc","tags":[]},{"url":"https://github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/verifier.c#L126-L137","tags":[]},{"url":"https://github.com/dvidelabs/flatcc/commit/0df9c097a19badc8bd22d93af8fd47bd291e5d9f","tags":[]},{"url":"https://hackmd.io/@haindpwn/flatcc-json-number-oob-read","tags":[]},{"url":"https://www.vulncheck.com/advisories/flatcc-through-0.6.4-out-of-bounds-read-via-verifier-check-header","tags":[]}],"exploitRefs":[{"url":"https://github.com/dvidelabs/flatcc","tags":[]},{"url":"https://github.com/dvidelabs/flatcc/blob/v0.6.4/src/runtime/verifier.c#L126-L137","tags":[]},{"url":"https://github.com/dvidelabs/flatcc/commit/0df9c097a19badc8bd22d93af8fd47bd291e5d9f","tags":[]}],"hasPoc":true,"ai":null}