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CVE-2026-34759

Hackerbay Oneuptime broken access control

8.1 HIGHPublic exploitEPSS 0.67%
  1. Published2 Apr 2026

Description

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 unauthenticated attacker can purchase phone numbers on the victim's Twilio account and delete all existing alerting numbers. This issue has been patched in version 10.0.42.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Hackerbay Oneuptime< 10.0.42

Remediation

Fixed in
Hackerbay Oneuptime≥ 10.0.42

References

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Frequently asked

Is CVE-2026-34759 being actively exploited?

CVE-2026-34759 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.67%.

How severe is CVE-2026-34759?

CVE-2026-34759 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.67% probability of exploitation.

Which products are affected by CVE-2026-34759?

Affected products include Hackerbay Oneuptime.

How do I fix CVE-2026-34759?

Upgrade affected software to a fixed version, for example Hackerbay Oneuptime 10.0.42 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-34759 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.