CVE-2026-1436CWE-639

Improper Access Control (IDOR) vulnerability in Graylog Web Interface

High · published February 18, 2026

CVSS v4.0
7.1
EPSS
0%
Percentile
15.0
In the wild
Unconfirmed
What it is

Improper Access Control (IDOR) in the Graylog API, version 2.2.3, which occurs when modifying the user ID in the URL. An authenticated user can access other user's profiles without proper authorization checks. Exploiting this vulnerability allows valid users of the system to be listed and sensitive third-party information to be accessed, such as names, email addresses, internal identifiers, and last activity. The endpoint 'http://<IP>:12900/users/<my_user>' does not implement object-level authorization validations.

The record
Technical detail
CVSS v4.0
7.1 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00246 · 15.0th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-02-18T13:09Z
EPSS history
Timeline
  • 18 FEB 13:09Z
    Improper Access Control (IDOR) vulnerability in Graylog Web Interface
    cvelistv5