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CVE-2026-35053

Hackerbay Oneuptime authentication bypass

9.8 CRITICALPublic exploitEPSS 0.82%
  1. Published2 Apr 2026

Description

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, notification abuse, and data manipulation. This issue has been patched in version 10.0.42.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/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-2026-35053 being actively exploited?

CVE-2026-35053 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.82%.

How severe is CVE-2026-35053?

CVE-2026-35053 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.82% probability of exploitation.

Which products are affected by CVE-2026-35053?

Affected products include Hackerbay Oneuptime.

How do I fix CVE-2026-35053?

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-2026-35053 against the real software inventory on every managed device, every day. 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.