Uncontrolled recursion in the Ion reader in Amazon Ion Python before 0.15.0 might allow a remote unauthenticated actor to crash the application using the library, resulting in a denial of service, via a crafted, deeply nested Ion value. To remediate this issue, users should upgrade to version 0.15.0 or later.
History

Fri, 09 Oct 2026 16:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:amazon:ion-python:*:*:*:*:*:*:*:*

Sun, 04 Oct 2026 06:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Fri, 02 Oct 2026 15:15:00 +0000

Type Values Removed Values Added
First Time appeared Amazon
Amazon ion-python
Vendors & Products Amazon
Amazon ion-python

Thu, 01 Oct 2026 21:30:00 +0000


Thu, 01 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
Description Uncontrolled recursion in the Ion reader in Amazon Ion Python before 0.15.0 might allow a remote unauthenticated actor to crash the application using the library, resulting in a denial of service, via a crafted, deeply nested Ion value. To remediate this issue, users should upgrade to version 0.15.0 or later.
Title Uncontrolled recursion in the Ion reader in Amazon Ion Python
Weaknesses CWE-674
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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published: 2026-10-01T20:36:33.967Z

Updated: 2026-10-09T16:36:02.469Z

Reserved: 2026-10-01T16:57:41.444Z

Link: CVE-2026-104020

cve-icon Vulnrichment

Updated: 2026-10-02T18:27:44.731Z

cve-icon NVD

Status : Deferred

Published: 2026-10-01T21:17:18.650

Modified: 2026-10-02T19:16:40.303

Link: CVE-2026-104020

cve-icon Redhat

No data.