CVE-2026-86754 in Snipe-IT
Summary
by MITRE • 09/09/2026
Snipe-IT before 8.7.0 fails to properly gate Laravel Passport's OAuth client management routes, allowing any authenticated user to register OAuth clients with attacker-controlled redirect URIs. Attackers can trick administrators into approving consent screens, then exchange authorization codes for bearer tokens inheriting full admin API permissions lasting up to 40 years.
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Analysis
by VulDB Data Team • 09/09/2026
The vulnerability identified in Snipe-IT versions prior to 8.7.0 represents a critical failure in access control logic within the application's integration with Laravel Passport. Specifically, the OAuth client management routes were not properly gated by administrative privileges or sufficient authorization checks. This architectural flaw allows any authenticated user, regardless of their role level such as standard asset manager or viewer, to interact directly with endpoints designed for creating and managing OAuth clients. By exploiting this lack of proper access gating, an attacker can register new OAuth applications within the Snipe-IT instance without requiring elevated permissions that would normally be enforced by the application's business logic layer.
The technical mechanism of exploitation involves the creation of a malicious OAuth client where the redirect URI is set to a domain or endpoint controlled entirely by the attacker. This configuration is permitted because the system fails to validate whether the requesting user has the authority to define such sensitive parameters for new clients. Once the malicious client is registered, the attacker can initiate an OAuth authorization flow targeting legitimate administrators who have access to approve pending consent requests. Because the redirect URI points to the attacker's infrastructure, any administrator who approves the consent screen effectively authorizes a token exchange that grants the attacker full administrative API permissions via a bearer token.
The operational impact of this vulnerability is severe due to the extended validity period of the issued tokens. The resulting access tokens can remain valid for up to forty years, providing persistent and long-term unauthorized access to the Snipe-IT environment. With these inherited admin-level privileges, an attacker gains unrestricted read and write capabilities over all assets, users, licenses, and consumables managed by the system. This includes the ability to exfiltrate sensitive inventory data, modify asset configurations, create backdoor user accounts, or delete critical records. The persistence of the token means that even if the initial entry point is patched or detected, the attacker retains access until the tokens are manually revoked or expire after decades, complicating incident response and remediation efforts significantly.
This vulnerability aligns with CWE-269 Improper Privilege Escalation as it involves a lower-privileged user gaining higher-level capabilities through flawed authorization checks. Furthermore, from an offensive security perspective, this technique maps to MITRE ATT&CK T1078 Valid Accounts and specifically the OAuth Abuse sub-tactics where attackers leverage legitimate authentication mechanisms to maintain persistence or escalate privileges. The exploitation of consent screens also relates to techniques involving social engineering elements if administrators are tricked into approving requests they might otherwise scrutinize more closely, although in this case, the primary vector is technical rather than purely psychological.
Mitigation strategies must prioritize immediate upgrading to Snipe-IT version 8.7.0 or later where these access control checks have been corrected. For environments that cannot be immediately patched, administrators should audit existing OAuth clients for any unauthorized entries with suspicious redirect URIs and revoke their associated tokens. Implementing strict monitoring on administrative actions such as the creation of new OAuth applications can help detect exploitation attempts in real-time. Additionally, enforcing multi-factor authentication for all accounts with access to approve consent requests adds a critical layer of defense against this type of privilege escalation attack.