Amazon Ion-C <1.1.6 Uncontrolled Recursion DoS via Crafted Ion Data
CVE-2026-84851 Published on September 2, 2026
Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6
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.
Vulnerability Analysis
CVE-2026-84851 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Stack Exhaustion Vulnerability?
The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.
CVE-2026-84851 has been classified to as a Stack Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-84851
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Affected Versions
Amazon ion-c:- Before 1.1.6 is affected.