What is CVE-2026-90910?

CVE-2026-90910 is a critical-severity vulnerability in Apache Software Foundation Answer, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-10-19.

How severe is CVE-2026-90910?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Apache Software Foundation Answer

CVE-2026-90910

Missing authentication for critical function vulnerability in Apache Answer. This issue affects Apache Answer: through 2.0.2. The reaction API did not enforce content visibility controls, allowing unauthorized users to read reaction metadata from restricted content or add and remove their own reactions. Users are recommended to upgrade to version 2.0.3, which fixes the issue.

Vulnerability class: Broken Authentication

Published 2026-10-19 · last modified 2026-10-19.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apache Software Foundation Answer

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

lists.apache.org/thread/bhw80mvmnt9206wyqz80rcbwx1znv1p3 (vendor-advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2026-90910?: CVE-2026-90910 is a critical-severity vulnerability in Apache Software Foundation Answer, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-10-19.
How severe is CVE-2026-90910?: Critical severity. CVSS v3 base score is 9.8 out of 10.