# CVE-2026-90910: Apache Answer missing authentication for reactions API

Source: https://junglewise.ai/threats/cve-2026-90910-missing-authentication-for-critical-function-vulnerability-in  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-19. Updated: 2026-10-19  
License: CC BY 4.0 with a link back

CVE-2026-90910 · Severity: info · Published 2026-10-19

Apache Answer is a Q&A platform that allows users to post questions and answers with community reactions. A missing authentication check in the reactions API allows unauthorized users to view metadata from restricted content and modify reactions, potentially exposing sensitive information and enabling content manipulation.

Technologies: [Apache Answer](https://junglewise.ai/threats/technologies/apache-answer). Vendors: [Apache](https://junglewise.ai/threats/vendors/apache).

## Quick answers

**Is CVE-2026-90910 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-90910 being exploited in the wild.

**How severe is CVE-2026-90910?** Informational severity, published 19 October 2026.

**Which products and versions are affected?** Apache Answer through 2.0.2.

**Is there a fix for CVE-2026-90910?** Yes: fixed in 2.0.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-90910 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-90910?** Check whether you run Apache Answer at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.0.3

## Technical details

The reactions API in Apache Answer does not enforce content visibility controls, allowing unauthenticated or unprivileged users to read reaction metadata from restricted content and add/remove reactions. This affects the reaction endpoint which lacks proper authorization checks before processing requests.

## Affected products

- Apache Answer through 2.0.2

## Timeline

- 2026-10-19: disclosed

## References

- [https://lists.apache.org/thread/bhw80mvmnt9206wyqz80rcbwx1znv1p3](https://lists.apache.org/thread/bhw80mvmnt9206wyqz80rcbwx1znv1p3)

## Related threats

- [Apache Answer authentication algorithm implementation flaw](https://junglewise.ai/threats/cve-2026-86589-incorrect-implementation-of-authentication-algorithm)
- [Apache Answer missing authorization checks](https://junglewise.ai/threats/cve-2026-79633-vulnerability-in-apache-answer-this-issue-affects-apache-answer)
- [Apache Answer insufficient session expiration](https://junglewise.ai/threats/cve-2026-79624-insufficient-session-expiration-vulnerability-in-apache-answer)
- [Apache Answer sensitive information exposure in search](https://junglewise.ai/threats/cve-2026-79620-exposure-of-sensitive-information-through-data-queries)
- [Apache Answer information disclosure in user profiles](https://junglewise.ai/threats/cve-2026-79613-vulnerability-in-apache-answer-this-issue-affects-apache-answer)