All vulnerabilities
CVE-2026-90910

Apache Answer: Reaction API authorization bypass for restricted content

Apache Software Foundation Apache Answer
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.64%Chance of exploitation activity in the next 30 days, higher than 49% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published19 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 1

  • Apache Answeraffected: all versions through 2.0.2CVE List

References 1