What is CVE-2026-34905?

CVE-2026-34905 is a medium-severity vulnerability in Apache Answer, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-06-09.

How severe is CVE-2026-34905?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in Apache Answer

CVE-2026-34905

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.

Vulnerability class: Information Disclosure

Published 2026-06-09 · last modified 2026-07-23.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (24.3th percentile), scored 2026-11-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.003 · change: -0.002

Affected products

Apache Answer
Apache Software Foundation Answer — versions 0

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

lists.apache.org/thread/khxoft96sptr2kh0cpzgw7f6qwv0ltcf (vendor-advisory, Mailing List, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Issue Tracking)

Frequently asked questions

What is CVE-2026-34905?: CVE-2026-34905 is a medium-severity vulnerability in Apache Answer, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-06-09.
How severe is CVE-2026-34905?: Medium severity. CVSS v3 base score is 6.5 out of 10.