# Pterodactyl Wings symlink follow in chmod operation

Source: https://junglewise.ai/threats/pterodactyl-wings-symlink-follow-in-chmod-operation-f835b178  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-26. Updated: 2026-06-26  
License: CC BY 4.0 with a link back

Severity: medium · CVSS 5 · Published 2026-06-26

Pterodactyl Wings, the server management component for the Pterodactyl game hosting panel, contains a vulnerability that allows users to modify file permissions outside of their assigned server environment. By creating symbolic links to files on the host operating system, a user could potentially gain unauthorized access to or modify sensitive system files. This could lead to a compromise of the host server's integrity and security.

Technologies: [github.com/pterodactyl/wings (Go)](https://junglewise.ai/threats/technologies/github-com-pterodactyl-wings), [Pterodactyl Wings](https://junglewise.ai/threats/technologies/wings). Vendors: [Go](https://junglewise.ai/threats/vendors/go), [Pterodactyl](https://junglewise.ai/threats/vendors/pterodactyl).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Medium severity, with a CVSS score of 5, published 26 June 2026.

**Which products and versions are affected?** github.com/pterodactyl/wings (Go) >= 1.11.9, < 1.12.2; Pterodactyl Wings >= 1.11.9, < 1.12.2.

**Is there a fix for This vulnerability?** A patch was published on 2026-06-26: Fix released in version 1.12.2 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is This vulnerability attacked?** It is attacked over the network, in a software library.

**Am I affected?** Check whether you run github.com/pterodactyl/wings (Go) or Pterodactyl Wings at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A vulnerability exists in the `fchmodat` implementation within `wings/internal/ufs/fs_unix.go` of Pterodactyl Wings. The function calls the underlying Unix `fchmodat` system call without the `AT_SYMLINK_NOFOLLOW` flag and fails to validate if the target path is a symbolic link. An attacker with low-privileged network access to a managed server can create a symlink pointing to a file on the host filesystem and execute a chmod operation to change that host file's permissions. This bypasses container isolation (Scope: Changed) to impact the integrity of the host. The issue is patched in version 1.12.2.

## Affected products

- Pterodactyl Wings >= 1.11.9, < 1.12.2

## Timeline

- 2026-05-23: disclosed: Reported by Vz0n
- 2026-06-26: advisory: GitHub Advisory published
- 2026-06-26: patched: Fix released in version 1.12.2

## References

- [https://api.github.com/users/Vz0n](https://api.github.com/users/Vz0n)
- [https://github.com/Vz0n](https://github.com/Vz0n)
- [https://api.github.com/users/Vz0n/gists%7B/gist_id%7D](https://api.github.com/users/Vz0n/gists%7B/gist_id%7D)
- [https://api.github.com/users/Vz0n/repos](https://api.github.com/users/Vz0n/repos)
- [https://avatars.githubusercontent.com/u/65766278?v=4](https://avatars.githubusercontent.com/u/65766278?v=4)
- [https://api.github.com/users/Vz0n/events%7B/privacy%7D](https://api.github.com/users/Vz0n/events%7B/privacy%7D)

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- [Pterodactyl Panel and Wings privilege escalation via JWT scope reuse](https://junglewise.ai/threats/cve-2026-54593-pterodactyl-panel-and-wings-privilege-escalation-via-jwt-scope)