A fail-open error handling issue within the data masking utility of Powertools for AWS Lambda (Python) might allow actors to read sensitive field values that the application intended to mask. 



To remediate this issue, users should upgrade to version 3.35.0.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://aws.amazon.com/security/security-bulletins/2026-123-aws/ cve-icon cve-icon
https://github.com/aws-powertools/powertools-lambda-python/releases/tag/v3.35.0 cve-icon cve-icon
https://github.com/aws-powertools/powertools-lambda-python/security/advisories/GHSA-3vxg-4xv2-jfh5 cve-icon cve-icon
History

Thu, 01 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
Description A fail-open error handling issue within the data masking utility of Powertools for AWS Lambda (Python) might allow actors to read sensitive field values that the application intended to mask.  To remediate this issue, users should upgrade to version 3.35.0.
Title Fail-open error handling in the data masking utility in Powertools for AWS Lambda (Python)
Weaknesses CWE-390
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N'}

cvssV4_0

{'score': 6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: AMZN

Published:

Updated: 2026-10-01T21:13:27.713Z

Reserved: 2026-10-01T16:20:44.923Z

Link: CVE-2026-104002

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-01T22:17:00.567

Modified: 2026-10-01T22:17:00.567

Link: CVE-2026-104002

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses