CVE-2026-34759: OneUptime is an open-source monitoring and observability platform

Q: How do I fix CVE-2026-34759?

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

Q: Is CVE-2026-34759 being exploited?

CVE-2026-34759 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-2026-34759 affect?

CVE-2026-34759 affects oneuptime. Severity is high (CVSS 8.1). OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, multiple notification API endpoints are registered without authentication middleware, while sibling endpoints in the same codebase correctly use Cl

Q: How urgent is CVE-2026-34759?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 8.1REMOTEUPGRADE

CVE-2026-34759 is a high-severity flaw (CVSS 8.1) 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, multiple notification API endpoints are registered without authentication middleware, while sibling endpoints in the same codebase correctly use ClusterKeyAuthorization.isAuthorizedServiceMiddleware. These endpoints are externally reachable via the Nginx proxy at /notification/. Combined with a projectId leak from the public Status Page API, an unauthenti

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 51%)
CISA exploited list	No
Weakness	CWE-862
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 19:21 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.

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-2026-34759?

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

Is CVE-2026-34759 being exploited?

CVE-2026-34759 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-2026-34759 affect?

CVE-2026-34759 affects oneuptime. Severity is high (CVSS 8.1). OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, multiple notification API endpoints are registered without authentication middleware, while sibling endpoints in the same codebase correctly use Cl

How urgent is CVE-2026-34759?

Priority 50/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

nginx vulnerabilities

Related CVEs

CVE-2026-35053 CRITICAL 9.8 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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