What is the CVSS score of CVE-2026-1436?

CVE-2026-1436 has a CVSS 3.1 base score of 6.5 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.0%.

Which versions of Graylog are affected by CVE-2026-1436?

CVE-2026-1436 presents notable security risk, a IDOR vulnerability rated CVSS 6.5. Exploitation could compromise the security of affected deployments.

How to fix or mitigate CVE-2026-1436?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Graylog CVE-2026-1436

MEDIUM

Authorization Bypass Through User-Controlled Key (CWE-639)

2026-02-18 cve-coordination@incibe.es

Authentication Bypass Graylog

6.5

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.5 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 18, 2026 - 14:16 nvd

MEDIUM 6.5

DescriptionCVE.org

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.

AnalysisAI

Graylog 2.2.3 contains an insecure direct object reference (IDOR) vulnerability in its user API endpoint that allows authenticated users to enumerate and access other users' profiles by manipulating user IDs in requests. An attacker with valid credentials can extract sensitive information including usernames, email addresses, internal identifiers, and last activity timestamps from arbitrary user accounts. No patch is currently available for this vulnerability.

Technical ContextAI

This vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affects Graylog. 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 author