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VulnerabilityPublished Updated

CVE-2026-8596: Amazon SageMaker Python SDK · Cleartext Storage of Sensitive Information

Affects Amazon SageMaker Python SDKSource CVE Database V5

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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

CVSS 3.1 base score
7.2High
How severe the flaw is on the 0–10 CVSS scale.
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:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 14 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
AWSAmazon SageMaker Python SDKAffected
  • >=2.199.0 <=2.257.1
  • >=3.0.0 <=3.7.1
Fixed in–
PyPIsagemakerpkg:pypi/sagemakerOther threatsAffected
  • =2.199.0
  • =3.0.0
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

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