Graylog Web Interface 2.2.3 API Endpoint authorization

Summaryinfo

A vulnerability was found in Graylog Web Interface 2.2.3. It has been rated as problematic. Affected by this issue is some unknown functionality of the component API Endpoint. Performing a manipulation results in authorization. This vulnerability is cataloged as CVE-2026-1436. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Graylog Web Interface 2.2.3. It has been classified as problematic. This affects an unknown function of the component API Endpoint. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. This is going to have an impact on confidentiality. The summary by CVE 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://:12900/users/' does not implement object-level authorization validations.

The weakness was shared by Julen Garrido Estévez. It is possible to read the advisory at incibe.es. This vulnerability is uniquely identified as CVE-2026-1436 since 01/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 02/20/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0458). Be aware that VulDB is the high quality source for vulnerability data.

Affected

• Open Source Graylog

Productinfo

Vendor

• Graylog

Name

• Web Interface

Version

• 2.2.3

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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