Uncontrolled recursion in the Ion reader in Amazon Ion Python
Published Oct 1, 2026
8.7
HIGHCVSS 4.0
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.
Affected products
-
- Version 0StatusaffectedConstraints<0.15.0
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Amazon | Ion-Python | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
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
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
No EPSS score for this CVE.
References (3)
- https://aws.amazon.com/security/security-bulletins/2026-122-aws/ vendor-advisory
- https://github.com/amazon-ion/ion-python/releases/tag/v0.15.0 patch
- https://github.com/amazon-ion/ion-python/security/advisories/GHSA-93q6-f8hx-vv7f third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://aws.amazon.com/security/security-bulletins/2026-122-aws/ | vendor-advisory | |
| https://github.com/amazon-ion/ion-python/releases/tag/v0.15.0 | patch | |
| https://github.com/amazon-ion/ion-python/security/advisories/GHSA-93q6-f8hx-vv7f | third-party-advisory |
Change history (0)
No recorded changes yet.