CVE-2026-52856 Wings: Maliciously crafted packet during SFTP connection handshake causes denial of service
A malformed packet during SFTP handshake causes a panic in Wings, leading to denial of service for game server management.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-52856?
CVE-2026-52856 is a high-severity denial of service vulnerability in pterodactyl wings, published on 31 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Wings is the server control plane for Pterodactyl, a free, open-source game server management panel. Prior to 1.13.0, a malformed packet received during the SFTP connection handshake causes a Go panic. This issue is fixed in version 1.13.0.
Which versions are affected by CVE-2026-52856?
3 open source packages ship an affected version, including github.com/pterodactyl/wings.
| Package | Affected | Fixed in |
|---|---|---|
github.com/pterodactyl/wings Go | All versions | 1.13.0 |
github.com/pterodactyl/wings Go | All versions | 1.13.0 |
github.com/pterodactyl/wings Go | All versions | 1.13.0 |
How do I fix CVE-2026-52856?
Upgrade github.com/pterodactyl/wings to 1.13.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-52856 being exploited?
There is no known exploitation of CVE-2026-52856 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-ghrq-5wpp-hxx5, GO-2026-6156.