CVE-2026-84851

An uncontrolled recursion issue exists in Amazon Ion-C versions before 1.1.6 that might allow a remote unauthenticated actor to craft Ion data that exhausts the native call stack and crashes the application using the library, resulting in a denial of service.

Scoring

Severity

HIGH

CVSS base score

8.7

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS probability

0.34%

CWE

CWE-674

Published

2026-09-02

Last modified

2026-09-03

Affected products

• Amazon ion-c

Weakness type

• CWE-674

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