CVE-2026-112408
Missing verification of source of a communication channel in the default_bucket() function in…
- Risk score
- 74/100
- CVSS
- 8.1 v3.1
- Exploit chance (30 days)
- 0.7%
- Published
- 21 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- The Amazon SageMaker Python SDK V3 before 3.10.0 and V2 before 2.257.3 has a vulnerability where the source of a communication channel is not verified, allowing remote actors to achieve code execution and obtain IAM credentials. This could be used to gain elevated privileges.
- Affected
- {'products': ['Amazon SageMaker Python SDK'], 'packages': ['V3 before 3.10.0', 'V2 before 2.257.3'], 'versions': ['3.10.0', '2.257.3']}
- Fix
- Upgrade to Amazon SageMaker Python SDK 3.10.0 (V3) or 2.257.3 (V2)
- Exploitation
- No known exploitation
Why it is Amber
- CVSS 8.1 high
- Remotely exploitable without logging in
- On your watchlist: python
References
- https://aws.amazon.com/security/security-bulletins/2026-142-aws/
- https://github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.3
- https://github.com/aws/sagemaker-python-sdk/releases/tag/v3.10.0
- https://github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-5rx8-8fr2-f855
- https://pypi.org/project/sagemaker/2.257.3/
- https://pypi.org/project/sagemaker/3.10.0/
Original description
Missing verification of source of a communication channel in the default_bucket() function in Amazon SageMaker Python SDK V3 before 3.10.0 and V2 before 2.257.3 might allow remote actors to achieve code execution in the target SageMaker execution environment and obtain IAM credentials via pre-creation of a predictably named S3 bucket that the SDK uses without ownership validation. To remediate this issue, users should upgrade to Amazon SageMaker Python SDK 3.10.0 (V3) or 2.257.3 (V2).
Last activity 21 Oct 2026. Patch Forecast updates every hour.