CVE-2026-112408 json
Missing bucket ownership verification in Amazon SageMaker Python SDK default_bucket()
published 2026-10-21 18 d ago modified 2026-10-30 9 d ago also EUVD-2026-107541
- cvss
- 8.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 54%
- public exploits
- 0
- none known
Summary
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).
Patch / fix
- AWS Amazon SageMaker Python SDK 2.257.3, 3.10.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 9 d ago
Exploit prediction
0.74% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 4.0 | 9.4 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N |
| CNA | 4.0 | 9.4 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- AWS Amazon SageMaker Python SDK
Classification
- Weakness
-
- CWE-940 Improper Verification of Source of a Communication Channel
References
-
github.com
/aws/sagemaker-python-sdk/releases/tag/v2.257.3
release-notes, patch
-
github.com
/aws/sagemaker-python-sdk/releases/tag/v3.10.0
release-notes, patch
-
pypi.org
/project/sagemaker/3.10.0/
release-notes, patch
-
pypi.org
/project/sagemaker/2.257.3/
release-notes, patch
-
aws.amazon.com
/security/security-bulletins/2026-142-aws/
vendor-advisory
-
github.com
/aws/sagemaker-python-sdk/security/advisories/GHSA-5rx8-8fr2-f855
third-party-advisory
Sources
- CVE List CVE-2026-112408
- NVD CVE-2026-112408
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.