GHSA-5rmx-256w-8mj9

Source

https://github.com/advisories/GHSA-5rmx-256w-8mj9

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-5rmx-256w-8mj9/GHSA-5rmx-256w-8mj9.json

JSON Data

https://api.test.osv.dev/v1/vulns/GHSA-5rmx-256w-8mj9

Aliases

CVE-2026-27899

Published

2026-02-26T22:22:23Z

Modified

2026-02-27T00:31:43.552938Z

Severity

8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

WireGuard Portal is Vulnerable to Privilege Escalation via User Self-Update to Admin Level

Details

Privilege Escalation to Admin via User Self-Update in wg-portal

Summary

Any authenticated non-admin user can become a full administrator by sending a single PUT request to their own user profile endpoint with "IsAdmin": true in the JSON body. After logging out and back in, the session picks up admin privileges from the database.

Tested against wg-portal v2.1.2 (Docker image wgportal/wg-portal:v2).

Root Cause

When a user updates their own profile, the server parses the full JSON body into the user model, including the IsAdmin boolean field. A function responsible for preserving calculated or protected attributes pins certain fields to their database values (such as base model data, linked peer count, and authentication data), but it does not do this for IsAdmin. As a result, whatever value the client sends for IsAdmin is written directly to the database.

Impact

After the exploit, the attacker has full admin access to the WireGuard VPN management portal. They can:

Read and modify every user account
Create, modify, and delete WireGuard peers on any interface
View WireGuard interface configurations
Disable or lock other user accounts
Access the full user list and their API tokens

Patches

The problem was fixed in the latest release, v2.1.3. The docker images for the tag 'latest' built from the master branch also include the fix.

Database specific

{
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-269",
        "CWE-863"
    ],
    "github_reviewed_at": "2026-02-26T22:22:23Z",
    "nvd_published_at": "2026-02-26T02:16:20Z",
    "severity": "HIGH"
}

References

Affected packages

Go / github.com/h44z/wg-portal

Package

Name: github.com/h44z/wg-portal; View open source insights on deps.dev
Purl: pkg:golang/github.com/h44z/wg-portal

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.1.3

Database specific

last_known_affected_version_range

"<= 2.1.2"

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/02/GHSA-5rmx-256w-8mj9/GHSA-5rmx-256w-8mj9.json"