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TI-2026-78974 Aliases CVE-2026-112408

Missing bucket ownership check in Amazon SageMaker Python SDK

Priority MEDIUM 44CWE-940Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

Amazon SageMaker Python SDK V3 before 3.10.0 and V2 before 2.257.3 do not verify ownership of a predictably named S3 bucket that default_bucket() uses, which is tracked as CWE-940. A remote attacker who pre-creates that bucket can execute code in the target SageMaker execution environment and obtain IAM credentials.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00743 54th percentileScored 2026-11-07
Fix Fixed Amazon SageMaker Python SDK (AWS): 2.257.3, 3.10.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AWSAmazon SageMaker Python SDKbefore 2.257.3; 3.0.0 to before 3.10.02.257.3, 3.10.0Patch availableCNA
  • Amazon SageMaker Python SDK VendorAWS Affected before 2.257.3; 3.0.0 to before 3.10.0 Fixed in 2.257.3, 3.10.0 Patch available CNA

Remediation

Upgrade Amazon SageMaker Python SDK V3 to 3.10.0 or V2 to 2.257.3.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

  • Fix · CNA Amazon SageMaker Python SDK (AWS) Fixed in 2.257.3, 3.10.0

Timeline

  1. 2026-10-21 Threatist record created from CVE-2026-112408
  2. 2026-10-21 1 new reference · CNA
  3. 2026-10-30 CISA SSVC decision points changed

References

Patch 4

Advisory 2

  • TI-2026-23989 crypto: algif_aead - Revert to operating out-of-place KEVCVSS 3.1HIGH 7.8
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2024-18648 Amazon AWS Amplify CLI before 12.10.1 incorrectly configures the role trust policy of IAM… CVSS 3.1CRITICAL 9.8
  • TI-2024-05929 Openssh: regresshion - race condition in ssh allows rce/dos CVSS 3.1HIGH 8.1
  • TI-2025-03847 Input validation issue in AWS Amplify Studio UI component properties CVSS 4.0CRITICAL 9.0
  • TI-2026-11603 HTTP/2 Stream Parser Confusion Body-Inspection Bypass in Amazon CloudFront with AWS WAF CVSS 4.0HIGH 7.9
See all 383 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences