What is CVE-2026-1436?

CVE-2026-1436 is a medium-severity vulnerability in Graylog, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-02-18.

How severe is CVE-2026-1436?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Graylog

CVE-2026-1436

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…

Vulnerability class: IDOR (Insecure Direct Object Reference)

EPSS: 0.002 (11.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Graylog — versions 2.2.3
Graylog Web Interface — versions 2.2.3

Weakness classification (CWE)

CWE-639 — Authorization Bypass Through User-Controlled Key

References

cve-coordination@incibe.es (Third Party Advisory, patch)

Frequently asked questions

What is CVE-2026-1436?: CVE-2026-1436 is a medium-severity vulnerability in Graylog, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-02-18.
How severe is CVE-2026-1436?: Medium severity. CVSS v3 base score is 6.5 out of 10.