CVE-2026-48912: Apache Answer: Improper authorization in avatar update cleanup allows authenticated users to delete arbitrary uploaded files by URL

[Enxin Xie <linkinstar () apache org>]

Severity: moderate 

Affected versions:

- Apache Answer through 2.0.1

Description:

Improper Input Validation vulnerability in Apache Answer.

This issue affects Apache Answer: through 2.0.1.

 A missing ownership check in the avatar-cleanup logic allows any authenticated user to delete other users' uploaded 
files by supplying their file URLs.
Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Credit:

tonghuaroot (reporter)

References:

https://answer.apache.org
https://www.cve.org/CVERecord?id=CVE-2026-48912