CVE-2025-6011

Timing Side-Channel in Vault’s Userpass Auth Method

3.7 LowFix available

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: None
Availability: None

Exploit likelihood

0.38%Up 0.4 points since Aug 2, 2025

What each source reports

CVE List Score used 3.7

Timing Side-Channel in Vault’s Userpass Auth Method

Record: CVE-2025-6011
CVSS 3.1: 3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-203
Updated: 2026-11-02

EUVDEUVD-2025-23395 3.7

Record: EUVD-2025-23395
CVSS 3.1: 3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-mwgr-84fv-3jh9 3.7

Hashicorp Vault has an Observable Discrepancy on Existing and Non-Existing Users

Record: GHSA-mwgr-84fv-3jh9
CVSS 3.1: 3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-203
Updated: 2026-11-02

NVD 3.7

Record: CVE-2025-6011
CVSS 3.1: 3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-203
Updated: 2026-11-02

OSV 3.7

Timing Side-Channel in Vault’s Userpass Auth Method

Record: CVE-2025-6011
CVSS 3.1: 3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-203
Updated: 2026-11-02

OSVGHSA-mwgr-84fv-3jh9 3.7

Hashicorp Vault has an Observable Discrepancy on Existing and Non-Existing Users

Record: GHSA-mwgr-84fv-3jh9
CVSS 3.1: 3.7 LowCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Weakness: CWE-203
Updated: 2026-11-02

Show 5 moreShow less

OSVBIT-vault-2025-6011 No score

Timing Side-Channel in Vault’s Userpass Auth Method

Record: BIT-vault-2025-6011
Updated: 2026-11-02

OSVGO-2025-3839 No score

Hashicorp Vault has an Observable Discrepancy on Existing and Non-Existing Users in github.com/hashicorp/vault

Hashicorp Vault has an Observable Discrepancy on Existing and Non-Existing Users in github.com/hashicorp/vault

Record: GO-2025-3839
Updated: 2026-11-02

OSVopenSUSE-SU-2025:15434-1 No score

govulncheck-vulndb-0.0.20250811T192933-1.1 on GA media

These are all security issues fixed in the govulncheck-vulndb-0.0.20250811T192933-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2025:15434-1
Updated: 2026-11-02

OSVopenSUSE-SU-2025:15460-1 No score

openbao-2.3.2-1.1 on GA media

These are all security issues fixed in the openbao-2.3.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2025:15460-1
Updated: 2026-11-02

OSVSUSE-SU-2025:02912-1 No score

Security update for govulncheck-vulndb

This update for govulncheck-vulndb fixes the following issues:

Update to version 0.0.20250814T182633 2025-08-14T18:26:33Z (jsc#PED-11136)

Go CVE Numbering Authority IDs added or updated with aliases:
- GO-2025-3765 CVE-2024-44906 GHSA-h4h6-vccr-44h2
- GO-2025-3829 CVE-2025-54410 GHSA-4vq8-7jfc-9cvp
Update to version 0.0.20250811T192933 2025-08-11T19:29:33Z (jsc#PED-11136)

Go CVE Numbering Authority IDs added or updated with aliases:
- GO-2025-3822 CVE-2025-53942 GHSA-9g4j-v8w5-7x42
- GO-2025-3829 CVE-2025-54410 GHSA-4vq8-7jfc-9cvp
- GO-2025-3830 CVE-2025-54388 GHSA-x4rx-4gw3-53p4
- GO-2025-3831 CVE-2025-50738 GHSA-hfcf-79gh-f3jc
- GO-2025-3832 CVE-2021-21411 GHSA-652x-m2gr-hppm
- GO-2025-3833 CVE-2025-54576 GHSA-7rh7-c77v-6434
- GO-2025-3834 CVE-2025-54424 GHSA-8j63-96wh-wh3j
- GO-2025-3835 CVE-2025-54386 GHSA-q6gg-9f92-r9wg
- GO-2025-3836 CVE-2025-6037 GHSA-6c5r-4wfc-3mcx
- GO-2025-3837 CVE-2025-5999 GHSA-6h4p-m86h-hhgh
- GO-2025-3838 CVE-2025-6000 GHSA-mr4h-qf9j-f665
- GO-2025-3839 CVE-2025-6011 GHSA-mwgr-84fv-3jh9
- GO-2025-3840 CVE-2025-6004 GHSA-qgj7-fmq2-6cc4
- GO-2025-3841 CVE-2025-6014 GHSA-qv3p-fmv3-9hww
- GO-2025-3842 CVE-2025-6015 GHSA-v6r4-35f9-9rpw
- GO-2025-3843 CVE-2025-8341 GHSA-3c93-92r7-j934
- GO-2025-3844 CVE-2025-53534 GHSA-fm3m-jrgm-5ppg
- GO-2025-3845 CVE-2025-54801 GHSA-qx2q-88mx-vhg7
- GO-2025-3847 CVE-2025-54799 GHSA-q82r-2j7m-9rv4
- GO-2025-3848 CVE-2025-6013 GHSA-7rx2-769v-hrwf
- GO-2025-3851 CVE-2025-44779 GHSA-93jv-pvg8-hf3v
- GO-2025-3852 CVE-2025-7195 GHSA-856v-8qm2-9wjv
- GO-2025-3853 CVE-2025-55000 GHSA-f7c3-mhj2-9pvg
- GO-2025-3854 CVE-2025-54999 GHSA-hh28-h22f-8357
- GO-2025-3855 CVE-2025-54998 GHSA-j3xv-7fxp-gfhx
- GO-2025-3856 CVE-2025-55003 GHSA-rxp7-9q75-vj3p
- GO-2025-3857 CVE-2025-54996 GHSA-vf84-mxrq-crqc
- GO-2025-3858 CVE-2025-54997 GHSA-xp75-r577-cvhp
- GO-2025-3859 CVE-2025-55001 GHSA-2q8q-8fgw-9p6p
Update to version 0.0.20250807T150727 2025-08-07T15:07:27Z (jsc#PED-11136)

Go CVE Numbering Authority IDs added or updated with aliases:
- GO-2025-3849 CVE-2025-47907

Record: SUSE-SU-2025:02912-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`github.com/hashicorp/vault` Go	before 1.20.1	1.20.1
`vault` Bitnami	before 1.20.1	1.20.1
`govulncheck-vulndb` SUSE:Linux Enterprise Module for Package Hub 15 SP6	before 0.0.20250814T182633-150000.1.98.1	0.0.20250814T182633-150000.1.98.1
`govulncheck-vulndb` openSUSE:Leap 15.6	before 0.0.20250814T182633-150000.1.98.1	0.0.20250814T182633-150000.1.98.1
`govulncheck-vulndb` openSUSE:Tumbleweed	before 0.0.20250811T192933-1.1	0.0.20250811T192933-1.1
`openbao` openSUSE:Tumbleweed	before 2.3.2-1.1	2.3.2-1.1

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-6011 is a low vulnerability (CVSS 3.7) in Hashicorp Vault, published August 1, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. Fixed in github.com/hashicorp/vault 1.20.1.

References

Show 32 moreShow less