CVE-2026-42221

critical

Published 2026-05-04 · Modified 2026-05-06

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

9.8

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

9.8

Description

Nginx-UI: Unauthenticated First-Run Installer Allows Remote Initial Admin Claim

Predictions

Exploit likelihood

97%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	github.com/0xJacky/Nginx-UI	`>=2.0.0,<2.3.8`	`2.3.8`
GO	github.com/0xJacky/Nginx-UI	`>= 2.0.0, <= 2.3.5`	`2.3.8`

Application impact

Vendor	Product	Versions	Fixed
nginxui	nginx_ui	`{"startIncluding":"2.0.0","endExcluding":"2.3.8"}`	`2.3.8`

References

CWEs

CWE-306

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.