Is CVE-2026-35053 actively exploited?

No active exploitation of CVE-2026-35053 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-35053 be exploited remotely?

Yes. CVE-2026-35053 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-35053?

CVE-2026-35053 has a CVSS score of 9.2 (CRITICAL).

HOME VULNERABILITIESCVE-2026-35053

CRITICAL

CVE-2026-35053

CWE-306Published: April 2, 2026· Updated: Apr 3, 2026

9.2

CVSS v3.1

EPSS:0.10%probability of exploitation in 30 daysPercentile:27.9th

Official 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.

NVD Source

Technical Analysis

CVE-2026-35053 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

CVSS v3.1 Vector Breakdown

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X