CVE-2026-22683: Windmill versions 1.56.0 through 1.614.0 contain a missing authorization vulnerability that allows users with

Q: How do I fix CVE-2026-22683?

flow: upgrade to newer than 1.2.2; windmill: upgrade to newer than 1.614.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-22683 being exploited?

CVE-2026-22683 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-2026-22683 affect?

CVE-2026-22683 affects flow, windmill. Severity is high (CVSS 8.8). Windmill versions 1.56.0 through 1.614.0 contain a missing authorization vulnerability that allows users with the Operator role to perform prohibited entity creation and modification actions via the backend API. Although Operators are docum

This month

HIGH 8.8UPGRADEUPGRADE

CVE-2026-22683 is a high-severity flaw (CVSS 8.8) affecting flow, windmill. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Windmill versions 1.56.0 through 1.614.0 contain a missing authorization vulnerability that allows users with the Operator role to perform prohibited entity creation and modification actions via the backend API. Although Operators are documented and priced as unable to create or modify entities, the API does not enforce the Operator restriction on workspace endpoints, allowing an Operator to create and update scripts, flows, apps, and raw_apps. S

Why this priority

High severity

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	2.6% (top 15%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-04-07
Last modified	2026-10-26

Publisher (CNA): VulnCheck · Vendor: nextcloud · windmill

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-07 17:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

nextcloud flow UPGRADE

Affected: >= 1.0.0 and <= 1.2.2

Fixed in: newer than 1.2.2

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy flow || rpm -q flow || flow --version

2. UPGRADE to newer than 1.2.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade flow

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade flow

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 1.0.0 (Debian / Ubuntu)

apt-cache madison flow sudo apt install flow=<VERSION_BEFORE_1.0.0> sudo apt-mark hold flow

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

dnf --showduplicates list flow sudo dnf downgrade flow-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add flow

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.

windmill windmill UPGRADE

Affected: >= 1.56.0 and <= 1.614.0

Fixed in: newer than 1.614.0

Safe to downgrade to: a release before 1.56.0

1. Check installed version

apt-cache policy windmill || rpm -q windmill || windmill --version

2. UPGRADE to newer than 1.614.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade windmill

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade windmill

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 1.56.0 (Debian / Ubuntu)

apt-cache madison windmill sudo apt install windmill=<VERSION_BEFORE_1.56.0> sudo apt-mark hold windmill

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

dnf --showduplicates list windmill sudo dnf downgrade windmill-<VERSION_BEFORE_1.56.0> sudo dnf versionlock add windmill

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.

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Nuclei scan template: Windmill < 1.603.3 - Operator Authorization Bypass

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-2026-22683?

flow: upgrade to newer than 1.2.2; windmill: upgrade to newer than 1.614.0. Exact commands for each OS are on this page.

Is CVE-2026-22683 being exploited?

CVE-2026-22683 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-2026-22683 affect?

CVE-2026-22683 affects flow, windmill. Severity is high (CVSS 8.8). Windmill versions 1.56.0 through 1.614.0 contain a missing authorization vulnerability that allows users with the Operator role to perform prohibited entity creation and modification actions via the backend API. Although Operators are docum

How urgent is CVE-2026-22683?

Priority 52/100. High severity

Software pages

Nextcloud vulnerabilities

References

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