HIGH 8.7 NVD
CVE-2026-104020
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 librar
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.
References
- https://aws.amazon.com/security/security-bulletins/2026-122-aws/
- https://github.com/amazon-ion/ion-python/releases/tag/v0.15.0
- https://github.com/amazon-ion/ion-python/security/advisories/GHSA-93q6-f8hx-vv7f
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-10-01 via NVD.
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