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 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 v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:graylog:graylog:2.2.3:*:*:*:*:*:*:*

History

18 Feb 2026, 20:23

Type	Values Removed	Values Added
First Time		Graylog Graylog graylog
CPE		cpe:2.3:a:graylog:graylog:2.2.3:::::::*
References	~~() https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog -~~	() https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-graylog - Third Party Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5

18 Feb 2026, 14:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-02-18 14:16

Updated : 2026-02-18 20:23

NVD link : CVE-2026-1436

Mitre link : CVE-2026-1436

CVE.ORG link : CVE-2026-1436

JSON object : View

Products Affected

graylog

graylog

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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