CVE-2026-88344 flatcc - Out-of-Bounds Read

flatcc 4c3b999e contains an out-of-bounds read caused by an integer digit-scan loop in schema lexer lex() advancing past buffer end when schema ends with a digit, letting attackers cause denial of service via crash, exploit requires crafted schema input.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.40% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Out-of-Bounds Read
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
22 September 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to the latest version of flatcc.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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