CVE-2026-1436 — MEDIUM (6.5)

Vulnerability Description

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.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

NONE

Affected Products

Vendor	Product	Versions
Graylog	Graylog	2.2.3

Related Weaknesses (CWE)

CWE-639

References

https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-grayThird Party Advisory

FAQ

What is CVE-2026-1436?

CVE-2026-1436 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 authorizatio...

How severe is CVE-2026-1436?

CVE-2026-1436 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-1436?

Check the references section above for vendor advisories and patch information. Affected products include: Graylog Graylog.