In RESTEasy the insecure File.createTempFile() is used in the DataSourceProvider, FileProvider and Mime4JWorkaround classes which creates temp files with insecure permissions that could be read by a local user.
https://security.netapp.com/advisory/ntap-20230427-0001/
https://github.com/resteasy/resteasy/pull/3409/commits/807d7456f2137cde8ef7c316707211bf4e542d56
Published: 2023-02-17
Updated: 2025-03-18
Named Vulnerability: Insecure Temporary File in RESTEasy
Base Score: 4.6
Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:N
Severity: Medium
Base Score: 5.5
Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Severity: Medium
EPSS: 0.00038