{"id":"CVE-2026-104002","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-104002","generatedAt":"2026-10-28T01:52:13.377Z","title":"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.","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. \n\n\n\nTo remediate this issue, users should upgrade to version 3.35.0.","published":"2026-10-01T22:17:01.000Z","lastModified":"2026-10-02T19:16:40.000Z","status":"Awaiting Analysis","sourceIdentifier":"ff89ba41-3aa1-4d27-914a-91399e9639e5","cvss":{"version":"4.0","score":6,"severity":"MEDIUM","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-390"],"affected":[],"epss":{"score":0.00306,"percentile":0.23158,"date":"2026-10-26","history":[{"date":"2026-10-02","score":0.00306,"percentile":0.2119}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-01T22:17:01.000Z","detail":{"score":"6.0","severity":"MEDIUM","publishedAt":"2026-10-01T22:17:00.567Z"},"summary":"New CVE, medium severity (CVSS 6.0)."}],"references":[{"url":"https://aws.amazon.com/security/security-bulletins/2026-123-aws/","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://github.com/aws-powertools/powertools-lambda-python/releases/tag/v3.35.0","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"},{"url":"https://github.com/aws-powertools/powertools-lambda-python/security/advisories/GHSA-3vxg-4xv2-jfh5","source":"ff89ba41-3aa1-4d27-914a-91399e9639e5"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-104002","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}