Vulnerability Description
WireGuard Easy through 15.3.0, fixed in commit 66b292b, contains a cryptographically weak one-time link token generation vulnerability that allows unauthenticated network attackers to recover WireGuard peer credentials by brute-forcing a keyspace of at most 1000 candidate tokens per client ID, as the token is computed using CRC32 over a random value constrained to 0-999. Attackers can enumerate candidate tokens against the unauthenticated /cnf/:oneTimeLink route, which lacks rate limiting and does not validate token expiration, to obtain a peer's PrivateKey and PresharedKey and impersonate that peer on the VPN network.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/wg-easy/wg-easy/commit/66b292b11bde3664f05ffb016c8082665d261d
- https://github.com/wg-easy/wg-easy/pull/2661
- https://www.vulncheck.com/advisories/wireguard-easy-weak-token-generation-inform
FAQ
What is CVE-2026-63089?
CVE-2026-63089 is a vulnerability with a CVSS score of 9.3 (CRITICAL). WireGuard Easy through 15.3.0, fixed in commit 66b292b, contains a cryptographically weak one-time link token generation vulnerability that allows unauthenticated network attackers to recover WireGuar...
How severe is CVE-2026-63089?
CVE-2026-63089 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-63089?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.