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Vulnerability record · CVE-2026-88344 · published 22 September 2026

CVE-2026-88344: Path traversal vulnerability

An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema buffer ends with a digit, the integer digit-scan loop in lex() advances past the end of the input buffer and dereferences the out-of-bounds pointer. A specially crafted schema can trigger a one-byte heap buffer over-read, resulting in application crash and denial of service.

7.5 CVSS 3.1 High EPSS 0.40% · top 67.8% CWE-22 · Path traversal Awaiting Analysis
7.5CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
24 Sep 2026Last modified by NVD

Description

An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema buffer ends with a digit, the integer digit-scan loop in lex() advances past the end of the input buffer and dereferences the out-of-bounds pointer. A specially crafted schema can trigger a one-byte heap buffer over-read, resulting in application crash and denial of service.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

LinkTags
https://github.com/dvidelabs/flatcc/issues/384
https://github.com/jimjag/flatcc/commit/c1dcc8ecd1a74b1e9e724ec7dc98828a5c95528e
https://github.com/dvidelabs/flatcc/issues/384

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Source: NIST National Vulnerability Database (record CVE-2026-88344), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.