CVE-2026-107811: Nginx UI is a web user interface for the Nginx web server

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HIGH 8.8WATCHLISTUPGRADE

CVE-2026-107811 is a high-severity flaw (CVSS 8.8) 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. From 2.0.0 until 2.5.0, ordinary authenticated users can access /api/nodes and /api/nodes/:id, whose responses serialize the node token field. The same token is accepted as X-Node-Secret by AuthRequired and maps the request to initUser, allowing the user to impersonate a trusted node against a reachable cluster member. This cross-node authentication bypass can expose sensitive management

Why this priority

High severity
Public exploit reference
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-200, CWE-862
Published	2026-10-09
Last modified	2026-10-20

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

Last updated 2026-10-20 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-09 16:17 UTCPublished CVE record published
2026-10-20 15:07 UTCUpdated Record last modified

nginxui nginx ui UPGRADE

Affected: >= 2.0.0 and < 2.5.0

Fixed in: 2.5.0

Safe to downgrade to: a release before 2.0.0

1. Check installed version

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

2. UPGRADE to 2.5.0 (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.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison nginx-ui sudo apt install nginx-ui=<VERSION_BEFORE_2.0.0> sudo apt-mark hold nginx-ui

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nginx-ui sudo dnf downgrade nginx-ui-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add nginx-ui

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-107811?

nginx ui: upgrade to 2.5.0. Exact commands for each OS are on this page.

Is CVE-2026-107811 being exploited?

CVE-2026-107811 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-2026-107811 affect?

CVE-2026-107811 affects nginx ui. Severity is high (CVSS 8.8). Nginx UI is a web user interface for the Nginx web server. From 2.0.0 until 2.5.0, ordinary authenticated users can access /api/nodes and /api/nodes/:id, whose responses serialize the node token field. The same token is accepted as X-Node-S

How urgent is CVE-2026-107811?

Priority 50/100. High severity; Public exploit reference; On your watchlist

Software pages

nginx vulnerabilities

Related CVEs

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
CVE-2026-42223 MEDIUM 6.5 UPGRADE Nginx UI is a web user interface for the Nginx web server
CVE-2026-44015 HIGH 8.5 UPGRADE Nginx UI is a web user interface for the Nginx web server

References

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