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CVE-2025-6011

Timing Side-Channel in Vault’s Userpass Auth Method

LOW
3.7
CVSS Score
Published: August 1, 2025 at 06:00 PM UTC
Updated: June 17, 2026 at 10:00 AM UTC
1 product affected across 1 vendorVault

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Severity
LOW3.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vault· Hashicorp
95%
v < 1.16.23v < 1.20.11.17.0 ≤ v < 1.18.121.19.0 ≤ v < 1.19.71.20.0
Affected range stops below 1.16.23, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.18.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.19.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.20.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://discuss.hashicorp.com/t/hcsec-2025-15-timing-side-channel-in-vault-s-userpass-auth-method/76034

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.7LOWHashiCorp
Vector?

Quick Info

StatusANALYZED
CWE
CWE-203

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