CVE-2026-104020

HIGH CVSS 4.0: 8.7 EPSS 0.44%
Updated Oct 02, 2026
Amazon
Parameter Value
CVSS 8.7 (HIGH)
Affected Versions before 0.15.0
Fixed In 0.15.0
Type CWE-674
Vendor Amazon
Public PoC No

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.

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)

Vulnerable Products

amazon:ion-python