CVE-2026-90910

Critical

Description

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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductApache Answer

PublishedOct 19, 2026

First seenOct 19, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Vendor advisories

lists.apache.org/thread/bhw80mvmnt9206wyqz80rcbwx1znv1p3

Affected products

Product	Affected versions	Fixed in
Apache Software Foundation Apache Answer	v ≤ 2.0.2	—

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