CVE-2026-84851

Description

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.

CVSS Vector

References

• https://aws.amazon.com/security/security-bulletins/2026-094-aws/
• https://github.com/amazon-ion/ion-c/releases/tag/v1.1.6
• https://github.com/amazon-ion/ion-c/security/advisories/GHSA-9gfg-hgj4-gh44