{"id":"GHSA-mwgr-84fv-3jh9","summary":"Hashicorp Vault has an Observable Discrepancy on Existing and Non-Existing Users","details":"A timing side channel in Vault and Vault Enterprise’s (“Vault”) userpass auth method allowed an attacker to distinguish between existing and non-existing users, and potentially enumerate valid usernames for Vault’s Userpass auth method. Fixed in Vault Community Edition 1.20.1 and Vault Enterprise 1.20.1, 1.19.7, 1.18.12, and 1.16.23.","aliases":["BIT-vault-2025-6011","CVE-2025-6011","GO-2025-3839"],"modified":"2026-07-17T21:09:37.649412176Z","published":"2025-08-01T18:31:19Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2025-08-01T21:08:42Z","nvd_published_at":"2025-08-01T18:15:56Z","cwe_ids":["CWE-203"],"severity":"LOW"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6011"},{"type":"WEB","url":"https://discuss.hashicorp.com/t/hcsec-2025-15-timing-side-channel-in-vault-s-userpass-auth-method/76034"},{"type":"PACKAGE","url":"https://github.com/hashicorp/vault"}],"affected":[{"package":{"name":"github.com/hashicorp/vault","ecosystem":"Go","purl":"pkg:golang/github.com/hashicorp/vault"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.20.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/08/GHSA-mwgr-84fv-3jh9/GHSA-mwgr-84fv-3jh9.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}