Vulnerability · CVE-2026-27899
WireGuard Portal (or wg-portal) is a web-based configuration portal for WireGuard server management.
Published Feb 26, 2026 · catalog updated Jun 17, 2026 · wireguard portal
Check if you run it
No confirmed exploitation is on record for CVE-2026-27899. EPSS is 0.56%. Act only if a listed version of wireguard portal is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High8.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.56%
- Remediation
- Advisory link
- Affected products
- cpe wgportal/wireguard portal
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 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 full JSON body into the user model, including the 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 . As a result, whatever value the client sends for is written directly to the database. After the exploit, the attacker has full admin access to the WireGuard VPN management portal. The problem was fixed in v2.1.3. The docker images for the tag 'latest' built from the master branch also include the fix.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe wgportal/wireguard portalversion unspecified
How to fix CVE-2026-27899
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-27899. EPSS is 0.56%. Act only if a listed version of wireguard portal is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-269: Improper Privilege Management; CWE-863: Incorrect Authorization. EPSS 0.56%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Feb 26, 2026 · NIST NVD
Detected
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 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 pr
Jun 17, 2026 · NIST NVD
Updated
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 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 pr
Sources
- CVE.orgVulnerability recordCVE-2026-27899
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-27899
30-day exploitation probability 0.6%
first.org - NIST NVDVulnerability recordCVE-2026-27899
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
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.