CVE-2026-27899: WireGuard Portal (or wg-portal) is a web-based configuration portal for WireGuard server management

Q: How do I fix CVE-2026-27899?

wireguard portal: upgrade to 2.1.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-27899 being exploited?

CVE-2026-27899 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-27899 affect?

CVE-2026-27899 affects wireguard portal. Severity is high (CVSS 8.8). WireGuard Portal (or wg-portal) is a web-based configuration portal for WireGuard server management. Prior to version 2.1.3, any authenticated non-admin user can become a full administrator by sending a single PUT request to their own user

Routine

HIGH 8.8UPGRADE

CVE-2026-27899 is a high-severity flaw (CVSS 8.8) affecting wireguard portal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

WireGuard Portal (or wg-portal) is a web-based configuration portal for WireGuard server management. Prior to version 2.1.3, 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. When a user updates their own profile, the server parses the ful

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Weakness	CWE-269, CWE-863
Published	2026-02-26
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: wgportal

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-26 02:16 UTCPublished CVE record published
2026-06-17 10:27 UTCUpdated Record last modified

wgportal wireguard portal UPGRADE

Affected: < 2.1.3

Fixed in: 2.1.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy wireguard-portal || rpm -q wireguard-portal || wireguard-portal --version

2. UPGRADE to 2.1.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade wireguard-portal

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade wireguard-portal

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27899?

wireguard portal: upgrade to 2.1.3. Exact commands for each OS are on this page.

Is CVE-2026-27899 being exploited?

CVE-2026-27899 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27899 affect?

CVE-2026-27899 affects wireguard portal. Severity is high (CVSS 8.8). WireGuard Portal (or wg-portal) is a web-based configuration portal for WireGuard server management. Prior to version 2.1.3, any authenticated non-admin user can become a full administrator by sending a single PUT request to their own user

How urgent is CVE-2026-27899?

Priority 38/100. High severity

Software pages

WireGuard vulnerabilities

References

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