{"id":"CVE-2026-63089","state":"PUBLISHED","title":"WireGuard Easy Weak Token Generation Information Disclosure via OTL Route","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.","publishedAt":"2026-07-16T19:28:37.500Z","updatedAt":"2026-07-18T03:08:24.596Z","severity":{"score":9,"label":"Critical","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:L/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["wg-easy wg-easy"],"affected":[{"vendor":"wg-easy","product":"wg-easy","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"15.3.0","versionType":"semver"},{"version":"66b292b11bde3664f05ffb016c8082665d261ded","status":"unaffected","versionType":"git"}],"repo":"https://github.com/wg-easy/wg-easy"}],"references":["https://github.com/wg-easy/wg-easy/pull/2661","https://github.com/wg-easy/wg-easy/commit/66b292b11bde3664f05ffb016c8082665d261ded","https://www.vulncheck.com/advisories/wireguard-easy-weak-token-generation-information-disclosure-via-otl-route"],"weaknesses":["CWE-338","CWE-613"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/63xxx/CVE-2026-63089.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-63089","state":"PUBLISHED","datePublished":"2026-07-16T19:28:37.500Z","dateUpdated":"2026-07-18T03:08:24.596Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-15T15:45:44.600Z"},"containers":{"cna":{"title":"WireGuard Easy Weak Token Generation Information Disclosure via OTL Route","descriptions":[{"lang":"en","value":"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. 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