CVE-2026-90910 Apache Answer: Reaction API authorization bypass for restricted content
Attackers can bypass visibility controls to read or modify reaction metadata on restricted content in Apache Answer.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90910?
CVE-2026-90910 is a critical missing authorization vulnerability in Apache Answer, published on 19 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-90910?
How do I fix CVE-2026-90910?
No fix has been published for CVE-2026-90910 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-90910 being exploited?
There is no known exploitation of CVE-2026-90910 in the wild and no public exploit code.
Sources
Also known as GHSA-q532-rv5p-f5vr.