CVE-2026-104002

Fail-open error handling in the data masking utility in Powertools for AWS Lambda (Python)

Published Oct 1, 2026 CVSS 4.0 · 6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
CPEs cpe:2.3:a:aws:powertools-lambda-python:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Aws
Aws powertools-lambda-python
Vendors & Products Aws
Aws powertools-lambda-python
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
AMZN
Published
Updated
Oct 9, 2026, 4:32 PM
Reserved
Oct 1, 2026, 4:20 PM
Status
Awaiting Analysis
Published
Oct 1, 2026, 10:17 PM
Modified
Oct 2, 2026, 7:16 PM