Vulnerability · Published Sep 21, 2026 · Assigned by GitHub_M
CVE-2026-61630nginx ignition has TOTP Reuse During Validity Window
Medium 4.2
In plain English
A medium-severity improper authentication in nginx-ignition from lucasdillmann. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.2Medium
Exploit odds (30 days)0.4%top 67.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/lucasdillmann/nginx-ignition | 0.0.0-20260328015550-8d35e1eb5dd6 | GHSA-hf33-q6cf-c66f |
| Go | github.com/lucasdillmann/nginx-ignition | 0.0.0-20260328015550-8d35e1eb5dd6 | GO-2026-6537 |
| Ubuntu:22.04:LTS | nginx | no fix listed | UBUNTU-CVE-2026-61630 |
| Ubuntu:24.04:LTS | nginx | no fix listed | UBUNTU-CVE-2026-61630 |
| Ubuntu:26.04:LTS | nginx | no fix listed | UBUNTU-CVE-2026-61630 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| lucasdillmann | nginx-ignition | >= 2.33.0, < 2.35.1 |
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
References
- https://github.com/lucasdillmann/nginx-ignition/security/advisories/GHSA-hf33-q6cf-c66f x_refsource_CONFIRM
- https://github.com/lucasdillmann/nginx-ignition/commit/1cbfae0296f1b186158f5a294ec484060e00102e x_refsource_MISC
- https://github.com/lucasdillmann/nginx-ignition/commit/8d35e1eb5dd6a40fef94a45511fe08b0603af107 x_refsource_MISC