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.
History

Wed, 23 Sep 2026 17:00:00 +0000

Type Values Removed Values Added
Title Out‑of‑Bounds Read in flatcc Schema Lexer Leads to Denial of Service

Wed, 23 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 23 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Tue, 22 Sep 2026 22:15:00 +0000

Type Values Removed Values Added
First Time appeared Dvidelabs
Dvidelabs flatcc
Vendors & Products Dvidelabs
Dvidelabs flatcc

Tue, 22 Sep 2026 21:15:00 +0000

Type Values Removed Values Added
Title Out‑of‑Bounds Read in flatcc Schema Lexer Leads to Denial of Service
Weaknesses CWE-125

Tue, 22 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
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.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-09-22T00:00:00.000Z

Updated: 2026-09-23T15:10:16.388Z

Reserved: 2026-09-10T00:00:00.000Z

Link: CVE-2026-88345

cve-icon Vulnrichment

Updated: 2026-09-23T15:10:10.651Z

cve-icon NVD

Status : Deferred

Published: 2026-09-22T20:17:10.613

Modified: 2026-09-24T21:08:55.030

Link: CVE-2026-88345

cve-icon Redhat

No data.