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CVE-2026-34905: Apache Answer: Unlisted Questions Accessible via Direct API Access

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-09 · updated 2026-07-23
• Weakness: CWE-200

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.0. The unlisted question feature did not enforce access restrictions on direct API endpoints, allowing authenticated users to discover and access unlisted questions, their answers, comments, and revision history. Users are recommended to upgrade to version 2.0.1, which fixes the issue.

Affected products

• Apache Software Foundation Apache Answer: before 2.0.1 — fixed in 2.0.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Answer 2.0.1. Check the vendor advisory for mitigations.

References

• https://lists.apache.org/thread/khxoft96sptr2kh0cpzgw7f6qwv0ltcf
• http://www.openwall.com/lists/oss-security/2026/06/09/2

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