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CVE-2026-61630— nginx ignition has TOTP Reuse During Validity Window

Quick assessment

Affected
lucasdillmann nginx-ignition
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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.

CVSS 4.2 · Medium EPSS 0.23% · P14

Affected Version Matrix 1

VendorProduct Version RangeStatus
lucasdillmann nginx-ignition >= 2.33.0, < 2.35.1 affected
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I. Basic Information for CVE-2026-61630

Vulnerability Information

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Vulnerability Title
nginx ignition has TOTP Reuse During Validity Window
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
lucasdillmann nginx-ignition >= 2.33.0, < 2.35.1 -

II. Public POCs for CVE-2026-61630

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III. Intelligence Information for CVE-2026-61630

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Other References for CVE-2026-61630 (1)

Other References for CVE-2026-61630 (1)

Same Patch Batch · lucasdillmann · 2026-09-21 · 3 CVEs total

CVE-2026-61628 8.1 HIGH nginx ignition has Unauthenticated Admin Account Creation via Onboarding Race Condition
CVE-2026-61629 7.5 HIGH nginx ignition has ParseAcceptLanguage `_` separator bypass that enables ~75x CPU amplifi

IV. Related Vulnerabilities

Same product: nginx-ignition
Same vendor: lucasdillmann
Same weakness: CWE-287

V. Comments for CVE-2026-61630

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