← Vulnerability feed

Vulnerability record · CVE-2026-1436 · published 18 February 2026

CVE-2026-1436: Graylog insecure direct object reference vulnerability

Graylog · 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 authorization validations.

7.1 CVSS 4.0 High EPSS 0.22% · top 88.7% CWE-639 · Insecure direct object reference
7.1CVSS 4.0 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

Track CVE-2026-1436 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2021-37759Graylog sensitive information in log file vulnerabilityA Session ID leak in the DEBUG log file in Graylog before 4.1.2 allows attackers to escalate privileges (to the access level of the leaked session ID…EPSS 1.3%9.8CVE-2021-37760Graylog sensitive information in log file vulnerabilityA Session ID leak in the audit log in Graylog before 4.1.2 allows attackers to escalate privileges (to the access level of the leaked session ID).EPSS 1.3%9.3CVE-2026-1435Graylog insufficient session expiration vulnerabilityNot properly invalidated session vulnerability in Graylog Web Interface, version 2.2.3, due to incorrect management of session invalidation after new…EPSS 0.37%8.8CVE-2025-53106Graylog improper authorization vulnerabilityGraylog is a free and open log management platform. In versions 6.2.0 to before 6.2.4 and 6.3.0-alpha.1 to before 6.3.0-rc.2, Graylog users can gain …EPSS 0.59%8.8CVE-2024-24824Graylog improper access control vulnerabilityGraylog is a free and open log management platform. Starting in version 2.0.0 and prior to versions 5.1.11 and 5.2.4, arbitrary classes can be loaded…EPSS 35%8.1CVE-2020-15813Graylog improper certificate validation vulnerabilityGraylog before 3.3.3 lacks SSL Certificate Validation for LDAP servers. It allows use of an external user/group database stored in LDAP. The connecti…EPSS 0.78%7.1CVE-2024-52506Graylog information exposure vulnerabilityGraylog is a free and open log management platform. The reporting functionality in Graylog allows the creation and scheduling of reports which contai…EPSS 0.63%6.1CVE-2018-14380Graylog cross-site scripting vulnerabilityIn Graylog before 2.4.6, XSS was possible in typeahead components, related to components/common/TypeAheadInput.jsx and components/search/QueryInput.t…EPSS 0.98%

Source: NIST National Vulnerability Database (record CVE-2026-1436), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.