CVE-2026-27899: Github.com/h44z/wg portal WireGuard Portal Is Vulnerable To Vulnerability
HIGHCVE-2026-27899 is a HIGH (CVSS 8.8) wireguard portal is vulnerable to vulnerability (CWE-269: Improper Privilege Management) affecting Github.com/h44z/wg portal libraries in the Go ecosystem. The issue involves wireguard portal is vulnerable to privilege escalation via user self-update to admin level. Remediation is available by upgrading affected packages to version 2.1.3.
CVE-2026-27899 at a Glance
Security Impact
CVSS: 8.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2026-27899
To remediate this vulnerability, upgrade all affected Github.com/h44z/wg portal dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/h44z/wg-portal to 2.1.3Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/h44z/wg-portalHow to Check if You Are Affected
To determine whether your application is affected by CVE-2026-27899, inspect your project dependencies for Github.com/h44z/wg portal:
inspect dependencies for github.com/h44z/wg-portalAnalyze the terminal output to locate any version of Github.com/h44z/wg portal in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.1.3), 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-269: Improper Privilege Management, where the product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. In Github.com/h44z/wg portal, 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
CVE-2026-27899 Affected Github.com/h44z/wg portal Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/h44z/wg-portal
|
Go |
< 2.1.3
|
2.1.3
|
References
Frequently Asked Questions
What is CVE-2026-27899?
Which Github.com/h44z/wg portal versions are affected?
What version fixes CVE-2026-27899?
Is github.com/h44z/wg-portal affected?
What is the CVSS score of CVE-2026-27899?
What CWE is associated with CVE-2026-27899?
How can I check Go dependencies for CVE-2026-27899?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-5rmx-256w-8mj9",
"modified" : "2026-02-26T22:22:23Z",
"published" : "2026-02-26T22:22:23Z",
"aliases" : [ "CVE-2026-27899" ],
"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\n\n## Summary\n\nAny 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.\n\nTested against wg-portal v2.1.2 (Docker image `wgportal/wg-portal:v2`).\n\n## Root Cause\n\nWhen 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.\n\n## Impact\n\nAfter the exploit, the attacker has full admin access to the WireGuard VPN management portal. They can:\n\n- Read and modify every user account\n- Create, modify, and delete WireGuard peers on any interface\n- View WireGuard interface configurations\n- Disable or lock other user accounts\n- Access the full user list and their API tokens\n\n## Patches\nThe problem was fixed in the latest release, [v2.1.3](https://github.com/h44z/wg-portal/releases/tag/v2.1.3). The [docker images](https://hub.docker.com/r/wgportal/wg-portal) for the tag 'latest' built from the master branch also include the fix.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/h44z/wg-portal"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "2.1.3"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 2.1.2"
}
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/h44z/wg-portal/security/advisories/GHSA-5rmx-256w-8mj9"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-27899"
}, {
"type" : "WEB",
"url" : "https://github.com/h44z/wg-portal/commit/fe4485037a25426446ced95050e9498f477bf71d"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/h44z/wg-portal"
}, {
"type" : "WEB",
"url" : "https://github.com/h44z/wg-portal/releases/tag/v2.1.3"
}, {
"type" : "WEB",
"url" : "https://hub.docker.com/layers/wgportal/wg-portal/v2.1.3/images/sha256-39acfab55598a74e561828b8cb639515ddc222d6c884996111f5ef235aba9e7b"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-269", "CWE-863" ],
"severity" : "HIGH",
"github_reviewed" : true,
"github_reviewed_at" : "2026-02-26T22:22:23Z",
"nvd_published_at" : "2026-02-26T02:16:20Z"
}
}