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Critical · 9.3 CVE-2026-63089 EUVD-2026-45013GHSA-m894-wgpg-hwpv

WireGuard Easy Weak Token Generation Information Disclosure via OTL Route

Published Jul 16, 2026 · Updated Nov 8, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
wg-easy wg-easy ≤ 15.3.0 —

References