# CVE-2025-6011: Timing Side-Channel in Vault’s Userpass Auth Method

> CVE-2025-6011: Timing Side-Channel in Vault’s Userpass Auth Method. CVSS 3.7 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2025-6011
Last updated: 2026-06-17T10:00:59Z

- Published: 2025-08-01 18:00 UTC · Updated: 2026-06-17 10:00 UTC · Assigner: HashiCorp
- CVSS: 3.7 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS: 0.36%, 29th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-203

## Description

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.

## Affected vendors and products

- HashiCorp: Vault
- HashiCorp: Vault Enterprise

## Tracked companies

- [HashiCorp](https://rewindex.com/company/hashicorp.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-6011)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-6011)
- [https://discuss.hashicorp.com/t/hcsec-2025-15-timing-side-channel-in-vault-s-userpass-auth-method/76034](https://discuss.hashicorp.com/t/hcsec-2025-15-timing-side-channel-in-vault-s-userpass-auth-method/76034)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2025-6011 · Markdown: https://rewindex.com/cve/CVE-2025-6011.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-6011 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:18.847Z