CVE-2026-8596: Amazon SageMaker Python SDK · Cleartext Storage of Sensitive Information
Affects Amazon SageMaker Python SDKSource CVE Database V5
Not known to be exploited · CVSS 7.2 High · patch available : patch Amazon SageMaker Python SDK soon.
Data as of 30 Oct 2026, 11:34 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 14 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 24 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| AWSAmazon SageMaker Python SDK | Affected
| Fixed in– |
PyPIsagemakerpkg:pypi/sagemakerOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
AWS has released patched versions of the Amazon SageMaker Python SDK: v2.257.2 and v3.8.0. Users should upgrade to these versions to remediate the vulnerability. Additionally, it is recommended to rebuild any models previously created with ModelBuilder using the updated SDK versions. Since this is a cloud-hosted service, AWS manages the underlying service infrastructure, but customers must update their SDK versions and model artifacts accordingly. Refer to the official AWS security bulletin at https://aws.amazon.com/security/security-bulletins/2026-031-aws/ for detailed guidance.
Description
CVE-2026-8596 is a high-severity vulnerability in the Amazon SageMaker Python SDK affecting versions 2.199.0 through 2.257.1 and 3.0.0 through 3.7.1. It involves cleartext storage of sensitive information in the ModelBuilder/Serve component, allowing a remote authenticated actor with specific permissions to extract the HMAC signing key from API responses. This can enable forging valid integrity signatures for crafted model artifacts, potentially leading to code execution in inference containers. The vulnerability requires the attacker to have permissions to call SageMaker describe APIs and write access to the model artifact S3 path. AWS has released fixed versions 2.257.2 and 3.8.0 to remediate this issue.
References
- github.com/aws/sagemaker-python-sdk/releases/tag/v2.257.2 (opens in a new tab)
- github.com/aws/sagemaker-python-sdk/releases/tag/v3.8.0 (opens in a new tab)
- aws.amazon.com/security/security-bulletins/2026-031-aws/ (opens in a new tab)
- github.com/aws/sagemaker-python-sdk/security/advisories/GHSA-7hh5-prp2-mfh5 (opens in a new tab)