CVE-2026-59218CWE-208

Open WebUI: Account enumeration via observable login timing discrepancy

Medium · published July 9, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
34.4
In the wild
Unconfirmed
What it is

Open WebUI is an extensible, feature-rich, and user-friendly self-hosted AI platform. Prior to 0.10.0, the /api/v1/auths/signin endpoint looked users up by email and only ran bcrypt password verification when a credential existed, making registered-account attempts measurably slower than missing-email attempts and allowing unauthenticated account enumeration. This issue is fixed in version 0.10.0.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00413 · 34.4th percentile
Weakness
CWE-208 · Observable Timing Discrepancy
Published
2026-07-09T15:53Z
EPSS history
Timeline
  • 09 JUL 15:53Z
    Open WebUI: Account enumeration via observable login timing discrepancy
    cvelistv5