CVE-2026-42222

CRITICAL
INFO Priority: 0.03 BB Relevance: 80/100
Published: 2026-05-04 Modified: 2026-10-26 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

Description

Nginx UI is a web user interface for the Nginx web server. In version 2.3.5, an unauthenticated bootstrap takeover exists in nginx-ui during the initial installation window exposed by POST /api/install. At time of publication no public patches are available.

Weakness Classification (2)

Affected Software (1)

VendorProductVersion
nginxui nginx_ui 2.3.5

References & Advisories (1)

Bug Bounty Relevance

80 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.34%
Raw Score 0.003390
Percentile 27.4%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00339
2026-10-28
0.00339

Intelligence Sources

nvd ref →