CVE-2026-90910CWE-306

CVE-2026-90910

Critical · published October 19, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
49.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00637 · 49.9th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-10-19T14:16Z
References (2)
https://lists.apache.org/thread/bhw80mvmnt9206wyqz80rcbwx1znv1p3 · [email protected]http://www.openwall.com/lists/oss-security/2026/10/16/34 · af854a3a-2127-422b-91ae-364da2661108
EPSS history
Timeline
  • 21 OCT 03:32Z
    EPSS moved — → 1%
    epss
  • 19 OCT 09:35Z
    Apache Answer: Reaction API authorization bypass for restricted content
    cvelistv5
  • 19 OCT 09:35Z
    Apache Answer: Reaction API authorization bypass for restricted content
    cvelistv5