CVE-2026-33026: Nginx UI is a web user interface for the Nginx web server

Q: How do I fix CVE-2026-33026?

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

Q: Is CVE-2026-33026 being exploited?

CVE-2026-33026 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-2026-33026 affect?

CVE-2026-33026 affects nginx ui. Severity is critical (CVSS 9.1). Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui backup restore mechanism allows attackers to tamper with encrypted backup archives and inject malicious configuration during restoration. This i

Q: How urgent is CVE-2026-33026?

Priority 48/100. Critical severity; Public exploit reference; On your watchlist

This month

CRITICAL 9.1WATCHLISTUPGRADE

CVE-2026-33026 is a critical-severity flaw (CVSS 9.1) 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 backup restore mechanism allows attackers to tamper with encrypted backup archives and inject malicious configuration during restoration. This issue has been patched in version 2.3.4.

Why this priority

Critical severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-312, CWE-347, CWE-354
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 20:16 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-2026-33026?

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

Is CVE-2026-33026 being exploited?

CVE-2026-33026 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-2026-33026 affect?

CVE-2026-33026 affects nginx ui. Severity is critical (CVSS 9.1). Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui backup restore mechanism allows attackers to tamper with encrypted backup archives and inject malicious configuration during restoration. This i

How urgent is CVE-2026-33026?

Priority 48/100. Critical severity; 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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