CVE-2026-32246CWE-287

Tinyauth vulnerable to TOTP/2FA bypass via OIDC authorize endpoint

High · published March 12, 2026

CVSS v3.1
8.5
EPSS
0%
Percentile
33.4
In the wild
Unconfirmed
What it is

Tinyauth is an authentication and authorization server. Prior to 5.0.3, the OIDC authorization endpoint allows users with a TOTP-pending session (password verified, TOTP not yet completed) to obtain authorization codes. An attacker who knows a user's password but not their TOTP secret can obtain valid OIDC tokens, completely bypassing the second factor. This vulnerability is fixed in 5.0.3.

The record
Technical detail
CVSS v3.1
8.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00403 · 33.4th percentile
Weakness
CWE-287 · Improper Authentication
Published
2026-03-12T18:59Z
EPSS history
Timeline
  • 12 MAR 18:59Z
    Tinyauth vulnerable to TOTP/2FA bypass via OIDC authorize endpoint
    cvelistv5