{"id":"CVE-2025-6037","aliases":["GHSA-6c5r-4wfc-3mcx","BIT-vault-2025-6037","GO-2025-3836"],"title":"Hashicorp Vault has Incorrect Validation for Non-CA Certificates","summary":"Hashicorp Vault has Incorrect Validation for Non-CA Certificates","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H","vendor":"hashicorp","product":"github.com/hashicorp/vault","ecosystem":"go","affected":["github.com/hashicorp/vault < 1.20.1"],"patched":["github.com/hashicorp/vault 1.20.1"],"published":"2025-08-01","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:26.714448344Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-6c5r-4wfc-3mcx","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-6037"},{"url":"https://discuss.hashicorp.com/t/hcsec-2025-18-vault-certificate-auth-method-did-not-validate-common-name-for-non-ca-certificates/76037"},{"url":"https://github.com/hashicorp/vault"}],"tags":["osv","go"],"epss":0.00249,"epssPercentile":0.16519,"ingestedAt":"2026-09-12T03:13:01.758Z","slug":"CVE-2025-6037","body":"## Overview\n\nVault and Vault Enterprise (“Vault”) TLS certificate auth method did not correctly validate client certificates when configured with a non-CA certificate as [+trusted certificate+|https://developer.hashicorp.com/vault/api-docs/auth/cert#certificate]. In this configuration, an attacker may be able to craft a malicious certificate that could be used to impersonate another user. Fixed in Vault Community Edition 1.20.1 and Vault Enterprise 1.20.1, 1.19.7, 1.18.12, and 1.16.23.\n\n## Affected packages\n\n- `github.com/hashicorp/vault < 1.20.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/hashicorp/vault 1.20.1`","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}