Vulnerabilities in pkg:golang/github.com/pterodactyl/wings

PACKAGE
Advisory Identifier: GHSA-ghrq-5wpp-hxx5
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Advisory Summary

CVE-2026-52856 is a HIGH (CVSS 7.5) denial of service vulnerability (CWE-617: Reachable Assertion) affecting Wings libraries in the Go ecosystem. The issue involves maliciously crafted packet during sftp connection handshake causes denial of service. Remediation is available by upgrading affected packages to version 1.13.0.

17 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:golang/github.com/pterodactyl/wings

17 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:golang/github.com/pterodactyl/wings. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-ghrq-5wpp-hxx5 CVE-2026-52856 HIGH Wings: Maliciously crafted packet during SFTP connection handshake causes denial of service
GHSA-pfvc-3p5h-x7h6 CVE-2026-52855 CRITICAL Wings exposes node configuration secrets through egg configuration-file templating
GHSA-q6hh-gp44-4hcm CVE-2026-52857 MODERATE Wings: Maliciously or erroneously created parsed config files can cause wings process to OOM
GHSA-8r6w-3qq5-4p4r CVE-2026-54593 HIGH Pterodactyl's improper JWT scoping allows subuser to upload files when not explicitly granted `file.create` permissions
GHSA-rhq6-9rgh-v45c - MODERATE Pterodactyl Wings: Chmod operation can be used to change permissions of files outside of the server container
GHSA-hr7j-63v7-vj7g - HIGH Pterodactyl Panel's SFTP sessions remain active after user account deletion or password change
GHSA-2497-gp99-2m74 CVE-2026-21696 HIGH Pterodactyl endlessly reprocesses/reuploads activity log data due to SQLite max parameters limit not being considered
GHSA-8w7m-w749-rx98 CVE-2025-69199 HIGH Pterodactyl websocket endpoints have no visible rate limits or monitoring, allowing for DOS attacks
GHSA-8c39-xppg-479c CVE-2025-68954 HIGH Pterodactyl does not revoke SFTP access when server is deleted or permissions reduced
GHSA-qq22-jj8x-4wwv CVE-2024-34068 MODERATE Pterodactyl Wings vulnerable to Server-Side Request Forgery during remote file pull
GHSA-gqmf-jqgv-v8fw CVE-2024-34066 HIGH Pterodactyl Wings vulnerable to Arbitrary File Write/Read
GHSA-494h-9924-xww9 CVE-2024-27102 CRITICAL Pterodactyl Wings vulnerable to improper isolation of server file access
GHSA-p744-4q6p-hvc2 CVE-2023-32080 CRITICAL Wings vulnerable to escape to host from installation container
GHSA-66p8-j459-rq63 CVE-2023-25168 CRITICAL Pterodactyl Wings contains UNIX Symbolic Link (Symlink) Following resulting in deletion of files and directories on the host system
GHSA-p8r3-83r8-jwj5 CVE-2023-25152 HIGH Pterodactyl Wings contains UNIX Symbolic Link (Symlink) Following
GHSA-jj6m-r8jc-2gp7 CVE-2021-32699 MODERATE Asymmetric Resource Consumption (Amplification) in Docker containers created by Wings
GHSA-6rg3-8h8x-5xfv - MODERATE Unchecked hostname resolution could allow access to local network resources by users outside the local network

CVE-2026-52856 at a Glance

CVE Identifier CVE-2026-52856
GHSA Identifier GHSA-ghrq-5wpp-hxx5
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-617: Reachable Assertion
Affected Product Wings
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-52856

To remediate this vulnerability, upgrade all affected Wings dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/pterodactyl/wings fixed: 1.13.0 
Upgrade github.com/pterodactyl/wings to 1.13.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/pterodactyl/wings

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-52856, inspect your project dependencies for Wings:

inspect dependencies for github.com/pterodactyl/wings

Analyze the terminal output to locate any version of Wings in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.13.0), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-617: Reachable Assertion, where the product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. In Wings, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary A maliciously crafted packet received & parsed during the SFTP connection handshake will cause a Go panic. ### Impact All wings users with an open SFTP port. ### Workarounds Close SFTP port.

CVE-2026-52856 Affected Wings Versions

1 component(s)
Fixed Versions:
1.13.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/pterodactyl/wings
golang/github.com/pterodactyl/wings
Go
< 1.13.0
1.13.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/pterodactyl/wings/security/advisories/GHSA-ghrq-5wpp-hxx5
Security Fix Commit FIX COMMIT
https://github.com/pterodactyl/wings/commit/8e49c7c0eda815d3ada171831876a1c14c493026
Wings Source Repository REPOSITORY
https://github.com/pterodactyl/wings
Wings Release RELEASE
https://github.com/pterodactyl/wings/releases/tag/v1.13.0

Frequently Asked Questions

What is CVE-2026-52856?
CVE-2026-52856 is a security vulnerability in Wings involving Maliciously crafted packet during SFTP connection handshake causes denial of service under CWE-617: Reachable Assertion.
Which Wings versions are affected?
Affected versions include releases prior to 1.13.0 across affected packages: github.com/pterodactyl/wings.
What version fixes CVE-2026-52856?
Upgrading to 1.13.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/pterodactyl/wings affected?
Yes, github.com/pterodactyl/wings is affected in releases prior to 1.13.0. Upgrade your dependency to 1.13.0 or later.
What is the CVSS score of CVE-2026-52856?
CVE-2026-52856 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-52856?
CVE-2026-52856 is classified under CWE-617: Reachable Assertion (The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.).
How can I check Go dependencies for CVE-2026-52856?
Run the dependency tree command: 'inspect dependencies for github.com/pterodactyl/wings'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-ghrq-5wpp-hxx5",
  "modified" : "2026-07-31T16:20:25Z",
  "published" : "2026-07-31T16:20:25Z",
  "aliases" : [ "CVE-2026-52856" ],
  "summary" : "Wings: Maliciously crafted packet during SFTP connection handshake causes denial of service",
  "details" : "### Summary\nA maliciously crafted packet received & parsed during the SFTP connection handshake will cause a Go panic.\n\n### Impact\nAll wings users with an open SFTP port.\n\n### Workarounds\nClose SFTP port.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/pterodactyl/wings"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.13.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/pterodactyl/wings/security/advisories/GHSA-ghrq-5wpp-hxx5"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pterodactyl/wings/commit/8e49c7c0eda815d3ada171831876a1c14c493026"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/pterodactyl/wings"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pterodactyl/wings/releases/tag/v1.13.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-129", "CWE-20", "CWE-248", "CWE-400", "CWE-617", "CWE-755" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-31T16:20:25Z",
    "nvd_published_at" : null
  }
}