Wings is the server control plane for the Pterodactyl game-server management panel. In versions up to and including 1.13.2, the SFTP write path does not enforce a server's disk quota during a transfer, allowing a tenant with SFTP write access to a single server to exhaust the host node's physical disk and take down every server on it. Wings checks available space only once, as a boolean, when the write handle is opened, using a stale cached usage value and without knowing the size of the incoming data, and it then returns a raw, unaccounted file handle that is never re-checked as the transfer proceeds. A single upload can therefore be written without bound, far beyond the configured disk limit, until the node's disk is full, and because a server stopped for exceeding its limit is not treated as suspended, SFTP writes are still accepted even after the quota is already exceeded. This issue is fixed in version 1.13.3.

CVE-2026-61617 affects Pterodactyl Wings, the server control plane for the Pterodactyl game-server management panel, in versions up to and including 1.13.2. The vulnerability exists in the SFTP write path, which fails to enforce disk quotas during file transfers. Wings performs only a single, boolean space check at the time a write handle is opened, relying on a stale cached value and without knowledge of incoming data size. The returned file handle is never re-checked as the transfer proceeds, allowing unlimited writes far beyond configured disk limits. A tenant with SFTP write access to a single server can exhaust the host node's physical disk, potentially taking down every server on that node. Compounding the issue, servers stopped for exceeding disk limits are not treated as suspended, so SFTP writes continue to be accepted even after quotas are already exceeded. The vulnerability is fixed in Wings version 1.13.3.