What is CVE-2026-61630?

CVE-2026-61630 is a medium-severity vulnerability, classified under Improper Authentication. CVSS score: 4.2/10. Published 2026-09-21.

How severe is CVE-2026-61630?

Medium severity. CVSS v3 base score is 4.2 out of 10.

CVE-2026-61630

CVE-2026-61630

nginx ignition is a user interface for the nginx web server. In versions 2.33.0 through 2.35.0, any user that has enabled the OTP 2FA can have their TOTP reused during the standard 30 second validity window. Version 2.35.1 patches the issue.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N.

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-61630?: CVE-2026-61630 is a medium-severity vulnerability, classified under Improper Authentication. CVSS score: 4.2/10. Published 2026-09-21.
How severe is CVE-2026-61630?: Medium severity. CVSS v3 base score is 4.2 out of 10.