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.
Scores
CVSS v3
3.7
EPSS
0.0003
EPSS Percentile
9.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-203
Status
published
Products (4)
hashicorp/vault
1.20.0
hashicorp/vault
< 1.16.23
hashicorp/vault
< 1.20.1
hashicorp/vault
0 - 1.20.1Go
Published
Aug 01, 2025
Tracked Since
Feb 18, 2026