CVE-2026-90910 Apache Answer - Broken Access Control

Apache Answer <= 2.0.2 contains a broken access control caused by missing authentication enforcement in the reaction API, letting unauthorized users read restricted reaction metadata and modify their own reactions, exploit requires no authentication.

CVSS base score 9.8 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
19 October 2026
Updated
20 October 2026
Weakness
CWE-306

Vendor fix

Upgrade to version 2.0.3.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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