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Vulnerability record · CVE-2026-88345 · published 22 September 2026

CVE-2026-88345: Out-of-bounds read vulnerability

An out-of-bounds read vulnerability exists in the schema lexer of flatcc 4c3b999e. When an exact-length FlatBuffers schema ends with an unterminated quotation mark, the C-string scanning logic in lex() dereferences the input pointer after it has reached the end of the buffer. 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 0.42% · top 66.8% CWE-125 · Out-of-bounds read Deferred
7.5CVSS 3.1 base score
0.42%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 ends with an unterminated quotation mark, the C-string scanning logic in lex() dereferences the input pointer after it has reached the end of the buffer. 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/385
https://github.com/jimjag/flatcc/commit/8581715e8ec4e5de8eea9fd6dad949e4dd7d0fa0
https://github.com/dvidelabs/flatcc/issues/385

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Source: NIST National Vulnerability Database (record CVE-2026-88345), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.