What is CVE-2026-28812?

CVE-2026-28812 is a critical-severity vulnerability in Apache Jspwiki, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2026-07-30.

How severe is CVE-2026-28812?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Apache Jspwiki

CVE-2026-28812

UserManager lack of checks allows impersonation in Apache JSPWiki up to 2.12.3 which may allow attackers to escalate privileges. Users are recommended to upgrade to version 2.12.4 or newer which fixes this issue.

EPSS: 0.004 (33.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apache Jspwiki
Apache Software Foundation Jspwiki — versions 0

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

security@apache.org (vendor-advisory, Mailing List, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-28812?: CVE-2026-28812 is a critical-severity vulnerability in Apache Jspwiki, classified under Authentication Bypass by Spoofing. CVSS score: 9.8/10. Published 2026-07-30.
How severe is CVE-2026-28812?: Critical severity. CVSS v3 base score is 9.8 out of 10.