Pterodactyl Wings up to 1.13.2 SFTP Write Path allocation of resources

Summaryinfo

A vulnerability labeled as critical has been found in Pterodactyl Wings up to 1.13.2. This vulnerability affects unknown code of the component SFTP Write Path. Such manipulation leads to allocation of resources. This vulnerability is traded as CVE-2026-61617. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Pterodactyl Wings up to 1.13.2 and classified as critical. Affected by this issue is an unknown part of the component SFTP Write Path. The manipulation with an unknown input leads to a allocation of resources vulnerability. Using CWE to declare the problem leads to CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. Impacted is availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-61617 since 07/10/2026. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 1.13.3 eliminates this vulnerability.

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Productinfo

Vendor

• Pterodactyl

Name

• Wings

Version

• 1.13.0
• 1.13.1
• 1.13.2

Website

• Product: https://github.com/pterodactyl/wings/

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