CVE-2026-84851

Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6

Published Sep 2, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Uncontrolled recursion in the Ion reader in Amazon Ion-C before 1.1.6
First Time appeared Amazon
Amazon ion-c
Weaknesses CWE-674
CPEs cpe:2.3:a:amazon:ion-c:*:*:*:*:*:*:*:*
Vendors & Products Amazon
Amazon ion-c
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Sep 3, 2026, 1:15 PM
Reserved
Sep 2, 2026, 1:01 PM
Status
Awaiting Analysis
Published
Sep 3, 2026, 5:16 AM
Modified
Sep 3, 2026, 4:44 PM