CVE-2026-34031: Apache Answer: The custom avatar was not properly validated

[Enxin Xie <linkinstar () apache org>]

Severity: moderate 

Affected versions:

- Apache Answer through 2.0.0

Description:

Unrestricted Upload of File with Dangerous Type vulnerability in Apache Answer.

This issue affects Apache Answer: through 2.0.0.

The server did not sufficiently validate user-supplied image URLs, allowing arbitrary external content to be embedded 
as profile images, which could expose users to unintended external requests and tracking by third-party servers.
Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Credit:

Reimar Fritz (reporter)

References:

https://answer.apache.org
https://www.cve.org/CVERecord?id=CVE-2026-34031