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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://aws.amazon.com/security/security-bulletins/2026-094-aws/
ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/amazon-ion/ion-c/releases/tag/v1.1.6
ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/amazon-ion/ion-c/security/advisories/GHSA-9gfg-hgj4-gh44
ff89ba41-3aa1-4d27-914a-91399e9639e5