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VULNERABILITIES

CVE-2026-104020 Details

UNDERGOING ENRICHMENT

The CVE is currently being enriched by the Volerion team. The enrichment process results in the association of reference link tags, CVSS, and CPE applicability statement data.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NDDVolerionCVSS-B:…Vector:This vulnerability is currently being analyzed.
CNA: AMZNCVSS-B:7.5 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://aws.amazon.com/security/security-bulletins/2026-122-aws/ AMZN
https://github.com/amazon-ion/ion-python/releases/tag/v0.15.0 AMZN
https://github.com/amazon-ion/ion-python/security/advisories/GHSA-93q6-f8hx-vv7f AMZN

Weakness Enumeration

CWE-IDCWE NameSource
CWE-674Uncontrolled RecursionAMZN

Affected Products

This vulnerability is currently being analyzed

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-104020
NVD Published Date:
Oct 1, 2026
NVD Last Modified:
Oct 2, 2026
Source:
AMZN
CVE-2026-104020 Details - Not Deferred