CVE-2026-104002CWE-390

CVE-2026-104002

Medium · published October 2, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
22.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
6.0 · 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
EPSS
0.00306 · 22.2th percentile
Weakness
CWE-390 · Detection of Error Condition Without Action
Published
2026-10-02T02:17Z
References (3)
https://aws.amazon.com/security/security-bulletins/2026-123-aws/ · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/aws-powertools/powertools-lambda-python/releases/tag/v3.35.0 · ff89ba41-3aa1-4d27-914a-91399e9639e5https://github.com/aws-powertools/powertools-lambda-python/security/advisories/GHSA-3vxg-4xv2-jfh5 · ff89ba41-3aa1-4d27-914a-91399e9639e5
EPSS history
Timeline
  • 03 OCT 03:41Z
    EPSS moved — → 0%
    epss
  • 01 OCT 21:05Z
    Fail-open error handling in the data masking utility in Powertools for AWS Lambda (Python)
    cvelistv5