What is CVE-2026-89264?

CVE-2026-89264 is a medium-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-09-11.

How severe is CVE-2026-89264?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CVE-2026-89264

CVE-2026-89264

MoguBlog through 6.2 fails to validate the comment author identity in the POST /web/comment/add endpoint, allowing authenticated users to post comments attributed to any other user. Attackers can supply arbitrary userUid values in the request body to impersonate other accounts including administrators.

Vulnerability class: IDOR (Insecure Direct Object Reference)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-89264?: CVE-2026-89264 is a medium-severity vulnerability, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 4.3/10. Published 2026-09-11.
How severe is CVE-2026-89264?: Medium severity. CVSS v3 base score is 4.3 out of 10.