CVE-2026-1436
IDOR Vulnerability in Graylog API 2.2.3 Exposes User Data
Publication date: 2026-02-18
Last updated on: 2026-02-18
Assigner: Spanish National Cybersecurity Institute, S.A. (INCIBE)
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| graylog | graylog | 2.2.3 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an Improper Access Control issue, specifically an Insecure Direct Object Reference (IDOR), found in the Graylog API version 2.2.3. It occurs when an authenticated user modifies the user ID in the URL to access other users' profiles without proper authorization checks. The API endpoint does not validate object-level permissions, allowing unauthorized access to sensitive user information.
How can this vulnerability impact me? :
Exploiting this vulnerability allows valid users to list other users of the system and access sensitive third-party information such as names, email addresses, internal identifiers, and last activity. This unauthorized access can lead to privacy breaches and potential misuse of personal data.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
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How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
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