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Fencer Vulns
medium 4.2

CVE-2026-61630 json

nginx ignition has TOTP Reuse During Validity Window

published 2026-09-21 48 d ago modified 2026-09-28 41 d ago also GHSA-hf33-q6cf-c66f , GO-2026-6537 , EUVD-2026-83922

cvss
4.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/lucasdillmann/nginx-ignition 0.0.0-20260328015550-8d35e1eb5dd6

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
48 d ago

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N
GitHub 3.1 4.2 CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
go github.com/lucasdillmann/nginx-ignition
>=0.0.0-20260217145239-1cbfae0296f1, <0.0.0-20260328015550-8d35e1eb5dd6
0.0.0-20260328015550-8d35e1eb5dd6

Affected products

  • lucasdillmann nginx-ignition

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.