SSRF in 2fauth
CVE-2026-32133
2FAuth is a web app to manage Two-Factor Authentication (2FA) accounts and generate their security codes. Prior to 6.1.0, a blind SSRF vulnerability exists in 2FAuth that allows authenticated users to make arbitrary HTTP requests from the server to internal networks and cloud metadata endpoints. The image parameter in OTP URL is not properly validated for internal / private IP addresses before making HTTP requests. While the previous fix added response validation to ensure only valid images are stored but HTTP request is still made to arbitrary URLs before this validation occurs. This vulnerability is fixed in 6.1.0.
Vulnerability class: SSRF (Server-Side Request Forgery)
EPSS: 0.005 (40.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- 2fauth
- Bubka 2fauth — versions < 6.1.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-32133?
- CVE-2026-32133 is a critical-severity vulnerability in 2fauth, classified under Server-Side Request Forgery (SSRF). CVSS score: 9.1/10. Published 2026-03-11.
- How severe is CVE-2026-32133?
- Critical severity. CVSS v3 base score is 9.1 out of 10.