CVE-2026-33027: Nginx UI is a web user interface for the Nginx web server

Q: How do I fix CVE-2026-33027?

nginx ui: upgrade to 2.3.4. Exact commands for each OS are on this page.

Q: Is CVE-2026-33027 being exploited?

CVE-2026-33027 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-33027 affect?

CVE-2026-33027 affects nginx ui. Severity is medium (CVSS 6.5). Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui configuration improperly handles URL-encoded traversal sequences. When specially crafted paths are supplied, the backend resolves them to the ba

Q: How urgent is CVE-2026-33027?

Priority 42/100. Public exploit reference; On your watchlist

This month

MEDIUM 6.5WATCHLISTUPGRADE

CVE-2026-33027 is a medium-severity flaw (CVSS 6.5) affecting nginx ui. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui configuration improperly handles URL-encoded traversal sequences. When specially crafted paths are supplied, the backend resolves them to the base Nginx configuration directory and executes the operation on the base directory (/etc/nginx). In particular, this allows an authenticated user to remove the entire /etc/nginx directory, resulting in a partial

Why this priority

Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 65%)
CISA exploited list	No
Weakness	CWE-22, CWE-73
Published	2026-03-30
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: nginxui

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-30 18:16 UTCPublished CVE record published
2026-06-17 10:36 UTCUpdated Record last modified

nginxui nginx ui UPGRADE

Affected: < 2.3.4

Fixed in: 2.3.4

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy nginx-ui || rpm -q nginx-ui || nginx-ui --version

2. UPGRADE to 2.3.4 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nginx-ui

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nginx-ui

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-33027?

nginx ui: upgrade to 2.3.4. Exact commands for each OS are on this page.

Is CVE-2026-33027 being exploited?

CVE-2026-33027 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-33027 affect?

CVE-2026-33027 affects nginx ui. Severity is medium (CVSS 6.5). Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui configuration improperly handles URL-encoded traversal sequences. When specially crafted paths are supplied, the backend resolves them to the ba

How urgent is CVE-2026-33027?

Priority 42/100. Public exploit reference; On your watchlist

Software pages

nginx vulnerabilities

Related CVEs

CVE-2026-33031 HIGH 8.1 UPGRADE Nginx UI is a web user interface for the Nginx web server
CVE-2026-34403 HIGH 8.1 UPGRADE Nginx UI is a web user interface for the Nginx web server
CVE-2026-42221 HIGH 8.1 UPGRADE Nginx UI is a web user interface for the Nginx web server
CVE-2026-42222 HIGH 8.1 DOWNGRADE Nginx UI is a web user interface for the Nginx web server
CVE-2026-42220 MEDIUM 6.5 UPGRADE Nginx UI is a web user interface for the Nginx web server

References

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