CVE-2023-33251: Lightbend Akka HTTP

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

When Akka HTTP before 10.5.2 accepts file uploads via the FileUploadDirectives.fileUploadAll directive, the temporary file it creates has too weak permissions: it is readable by other users on Linux or UNIX, a similar issue to CVE-2022-41946.

Affected products

• Lightbend Akka HTTP: before 10.5.2 (fixed in 10.5.2)

Published 2023-05-21. Last modified 2026-06-17.