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.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 3
https://aws.amazon.com/security/security-bulletins/2026-123-aws/
ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/aws-powertools/powertools-lambda-python/releases/tag/v3.35.0
ff89ba41-3aa1-4d27-914a-91399e9639e5
https://github.com/aws-powertools/powertools-lambda-python/security/advisories/…
ff89ba41-3aa1-4d27-914a-91399e9639e5