CVE-2026-35053: OneUptime is an open-source monitoring and observability platform

Q: How do I fix CVE-2026-35053?

oneuptime: upgrade to 10.0.42. Exact commands for each OS are on this page.

Q: Is CVE-2026-35053 being exploited?

CVE-2026-35053 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-2026-35053 affect?

CVE-2026-35053 affects oneuptime. Severity is critical (CVSS 9.8). OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, the Worker service's ManualAPI exposes workflow execution endpoints (GET /workflow/manual/run/:workflowId and POST /workflow/manual/run/:workflowId

Q: How urgent is CVE-2026-35053?

Priority 56/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-35053 is a critical-severity flaw (CVSS 9.8) affecting oneuptime. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, the Worker service's ManualAPI exposes workflow execution endpoints (GET /workflow/manual/run/:workflowId and POST /workflow/manual/run/:workflowId) without any authentication middleware. An attacker who can obtain or guess a workflow ID can trigger arbitrary workflow execution with attacker-controlled input data, enabling JavaScript code execution, notif

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 54%)
CISA exploited list	No
Weakness	CWE-306
Published	2026-04-02
Last modified	2026-10-06

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

Last updated 2026-10-06 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-02 20:16 UTCPublished CVE record published
2026-10-06 22:10 UTCUpdated Record last modified

hackerbay oneuptime UPGRADE

Affected: < 10.0.42

Fixed in: 10.0.42

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 10.0.42 (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

Fedora 46 · python-googleapis-common-protos · FIXED · 1.75.5-1.fc46~bootstrap · FEDORA-2026-d911c4c4e6 · source

sudo dnf upgrade --advisory=FEDORA-2026-d911c4c4e6

Fedora ELN · see advisory · FIXED · FEDORA-2026-e3987c278f · source

sudo dnf upgrade --advisory=FEDORA-2026-e3987c278f

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-6c3w-7xg4-4cf7

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-2026-35053?

oneuptime: upgrade to 10.0.42. Exact commands for each OS are on this page.

Is CVE-2026-35053 being exploited?

CVE-2026-35053 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-2026-35053 affect?

CVE-2026-35053 affects oneuptime. Severity is critical (CVSS 9.8). OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, the Worker service's ManualAPI exposes workflow execution endpoints (GET /workflow/manual/run/:workflowId and POST /workflow/manual/run/:workflowId

How urgent is CVE-2026-35053?

Priority 56/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-33396 CRITICAL 9.9 UPGRADE OneUptime is an open-source monitoring and observability platform
CVE-2026-34759 HIGH 8.1 UPGRADE OneUptime is an open-source monitoring and observability platform
CVE-2026-34758 CRITICAL 9.1 UPGRADE OneUptime is an open-source monitoring and observability platform
CVE-2026-34840 HIGH 8.1 UPGRADE OneUptime is an open-source monitoring and observability platform

References

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