CVE-2026-91851CWE-697CWE-863broken-access-control

CVE-2026-91851

published September 15, 2026

CVSS
5.3
EPSS
0%
Percentile
27.5
In the wild
Unconfirmed
What it is

Affected versions of MISP incorrectly filter dashboard templates that are restricted to a specific permission flag.

DashboardsController::listTemplates() allowed a template when either:

- its restrict_to_permission_flag matched one of the current user’s permission flags, or

- restrict_to_permission_flag equaled integer 0

However, restrict_to_permission_flag is a varchar. MySQL therefore performed numeric coercion when comparing the column against integer 0. Strings such as perm_site_admin convert numerically to zero, making expressions such as perm_site_admin = 0 evaluate true and causing the “unrestricted” branch to match permission-restricted templates as well.

Version affected: ≤2.5.45

The record
Technical detail
CVSS
5.3 · NONE
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00351 · 27.5th percentile
Weaknesses
CWE-697 · Incorrect Comparison; CWE-863 · Incorrect Authorization
Published
2026-09-15T13:16Z
References (1)
EPSS history
Timeline
  • 17 SEP 03:33Z
    EPSS moved — → 0%
    epss
  • 15 SEP 08:50Z
    MISP Dashboard Template ACL Bypass Due to VARCHAR-to-Integer Type Coercion in Permission Flag Comparison
    cvelistv5