CVE-2026-55843

Snipe-IT has an Improper Privilege Management issue

The update() method in UsersController passes the permission request field unconditionally to NormalizePermissionsPayloadAction, which returns an empty array when the field is absent. The result is passed to PreserveUnauthorizedPrivilegedPermissionsAction, which selectively restores only the superuser key (when the editor is not a superuser) and the admin key (when the editor is neither admin nor superuser). All other permissions, including the admin flag itself when the editing user is an admin, are discarded and $user->permissions is overwritten with the sparse result.

The canEditAuthFields gate permits admins to update other non-superuser accounts (including other admins). When an admin sends a PUT /users/{id} request for another admin without including the permission field, the target's admin flag and all granular permissions are permanently destroyed. The target loses administrative access entirely with no error, warning, or out-of-band notification.

A secondary, lower-impact path exists for non-admin users holding the users.edit permission: they may target regular (non-admin, non-superuser) accounts and wipe all granular permissions in the same way.

The application assigns, modifies, tracks, or checks privileges incorrectly, allowing a user to gain elevated access. Typical impact: privilege escalation beyond the intended level.

CVE-2026-55843 has a CVSS score of 6.5 (High). The vector is network-reachable, high privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (8.6.0); upgrading removes the vulnerable code path.

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Patched in https://github.com/grokability/snipe-it/commit/1cff2d67aabd00ee51d864c1d7fb717494c1d6ad

1. What is CVE-2026-55843? CVE-2026-55843 is a high-severity improper privilege management vulnerability in snipe/snipe-it (composer), affecting versions < 8.6.0. It is fixed in 8.6.0. The application assigns, modifies, tracks, or checks privileges incorrectly, allowing a user to gain elevated access.
2. How severe is CVE-2026-55843? CVE-2026-55843 has a CVSS score of 6.5 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of snipe/snipe-it are affected by CVE-2026-55843? snipe/snipe-it (composer) versions < 8.6.0 is affected.
4. Is there a fix for CVE-2026-55843? Yes. CVE-2026-55843 is fixed in 8.6.0. Upgrade to this version or later.
5. Is CVE-2026-55843 exploitable, and should I be worried? Whether CVE-2026-55843 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-55843 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-55843? Upgrade snipe/snipe-it to 8.6.0 or later.