CVE-2026-30957: OneUptime is a solution for monitoring and managing online services

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CRITICAL 9.9UPGRADE

CVE-2026-30957 is a critical-severity flaw (CVSS 9.9) affecting oneuptime. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated project user to execute arbitrary commands on the oneuptime-probe server/container. The root cause is that untrusted Synthetic Monitor code is executed inside Node's vm while live host-realm Playwright browser and page objects are exposed to it. A malicious user can call Playwright APIs on the in

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	1.2% (top 31%)
CISA exploited list	No
Weakness	CWE-749
Published	2026-03-10
Last modified	2026-10-07

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

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-10 18:18 UTCPublished CVE record published
2026-10-07 08:10 UTCUpdated Record last modified

hackerbay oneuptime UPGRADE

Affected: < 10.0.21

Fixed in: 10.0.21

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 10.0.21 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade oneuptime

Note

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

Exact fixes by distribution

npm · @oneuptime/common · FIXED · 10.0.21 · vulnerable: < 10.0.21 · source

npm install @oneuptime/common@">=10.0.21" npm ls @oneuptime/common

Fedora 46 · python-hatchling · FIXED · 1.33.0-1.fc46 · FEDORA-2026-3ccbf17812 · source

sudo dnf upgrade --advisory=FEDORA-2026-3ccbf17812

Fedora ELN · pie · FIXED · 1.5.3-1.eln159 · FEDORA-2026-e009523caa · source

sudo dnf upgrade --advisory=FEDORA-2026-e009523caa

Public exploits and detection

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

Write-up: github.com/OneUptime/oneuptime/security/advisories/GHSA-jw8q-gjvg-8w4q

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-2026-30957?

oneuptime: upgrade to 10.0.21. Exact commands for each OS are on this page.

Is CVE-2026-30957 being exploited?

CVE-2026-30957 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-2026-30957 affect?

CVE-2026-30957 affects oneuptime. Severity is critical (CVSS 9.9). OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, OneUptime Synthetic Monitors allow a low-privileged authenticated project user to execute arbitrary commands on the oneuptime-probe server/container. The

How urgent is CVE-2026-30957?

Priority 57/100. Critical severity; Public exploit reference

Related CVEs

CVE-2026-33396 CRITICAL 9.9 UPGRADE OneUptime is an open-source monitoring and observability platform
CVE-2026-32306 CRITICAL 9.9 UPGRADE OneUptime is a solution for monitoring and managing online services
CVE-2026-30958 HIGH 7.2 UPGRADE OneUptime is a solution for monitoring and managing online services
CVE-2026-30956 CRITICAL 9.9 UPGRADE OneUptime is a solution for monitoring and managing online services
CVE-2026-33143 HIGH 7.5 UPGRADE OneUptime is a solution for monitoring and managing online services

References

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