CVE-2026-104020 - Uncontrolled recursion in the Ion reader in Amazon Ion Python
CVE-2026-104020 is a denial of service vulnerability in the Ion reader component of Amazon Ion Python before version 0.15.0. The flaw is triggered by processing a crafted, deeply nested Ion value that causes uncontrolled recursion, leading to application errors or crashes. This issue affects versions prior to 0.15.0 of Amazon Ion Python.
AI Analysis
Technical Summary
Amazon Ion Python, an open-source Python implementation of the Amazon Ion data notation, contains a vulnerability (CVE-2026-104020) in its Ion reader. Versions before 0.15.0 are susceptible to uncontrolled recursion when parsing specially crafted deeply nested Ion values. This can cause the application to raise errors or crash, resulting in a denial of service condition.
Potential Impact
An attacker can cause the affected application using Amazon Ion Python versions prior to 0.15.0 to crash or become unresponsive by supplying a maliciously crafted deeply nested Ion value. This results in denial of service but does not indicate code execution or data compromise based on the provided information.
Mitigation Recommendations
Upgrade Amazon Ion Python to version 0.15.0 or later, where this vulnerability has been addressed. No other mitigation steps are indicated in the advisory. Patch status is confirmed as fixed in version 0.15.0.
CVE-2026-104020 - Uncontrolled recursion in the Ion reader in Amazon Ion Python
Description
CVE-2026-104020 is a denial of service vulnerability in the Ion reader component of Amazon Ion Python before version 0.15.0. The flaw is triggered by processing a crafted, deeply nested Ion value that causes uncontrolled recursion, leading to application errors or crashes. This issue affects versions prior to 0.15.0 of Amazon Ion Python.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Amazon Ion Python, an open-source Python implementation of the Amazon Ion data notation, contains a vulnerability (CVE-2026-104020) in its Ion reader. Versions before 0.15.0 are susceptible to uncontrolled recursion when parsing specially crafted deeply nested Ion values. This can cause the application to raise errors or crash, resulting in a denial of service condition.
Potential Impact
An attacker can cause the affected application using Amazon Ion Python versions prior to 0.15.0 to crash or become unresponsive by supplying a maliciously crafted deeply nested Ion value. This results in denial of service but does not indicate code execution or data compromise based on the provided information.
Mitigation Recommendations
Upgrade Amazon Ion Python to version 0.15.0 or later, where this vulnerability has been addressed. No other mitigation steps are indicated in the advisory. Patch status is confirmed as fixed in version 0.15.0.
Technical Details
- Classification
- {"confidence":0.88,"severitySource":"heuristic","classifier":"rss-v2"}
- Article Source
- {"url":"https://aws.amazon.com/security/security-bulletins/rss/2026-122-aws/","fetched":true,"fetchedAt":"2026-10-01T20:59:20.038Z","wordCount":179}
Threat ID: 6abec9a8a43b0b3b89ff5f33
Added to database: 10/01/2026, 20:59:20 UTC
Last enriched: 10/01/2026, 20:59:25 UTC
Last updated: 10/01/2026, 20:59:25 UTC
Views: 1
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