CVE-2026-24735: Apache Answer: Revision API Improper Access Control leads to Information Disclosure

[Enxin Xie <linkinstar () apache org>]

Severity: important 

Affected versions:

- Apache Answer through 1.7.1

Description:

Exposure of Private Personal Information to an Unauthorized Actor vulnerability in Apache Answer.

This issue affects Apache Answer: through 1.7.1.

An unauthenticated API endpoint incorrectly exposes full revision history for deleted content. This allows unauthorized 
user to retrieve restricted or sensitive information.
Users are recommended to upgrade to version 2.0.0, which fixes the issue.

Credit:

Sho Odagiri of GMO Cybersecurity by Ierae, Inc. (reporter)

References:

https://answer.apache.org
https://www.cve.org/CVERecord?id=CVE-2026-24735