Is CVE-2026-34759 actively exploited?

No active exploitation of CVE-2026-34759 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34759 be exploited remotely?

Yes. CVE-2026-34759 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34759?

CVE-2026-34759 has a CVSS score of 9.2 (CRITICAL).

HOME VULNERABILITIESCVE-2026-34759

CRITICAL

CVE-2026-34759

CWE-862Published: April 2, 2026· Updated: Apr 3, 2026

9.2

CVSS v3.1

EPSS:0.09%probability of exploitation in 30 daysPercentile:25.7th

Official 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.

NVD Source

Technical Analysis

CVE-2026-34759 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 ComplexityHigh

Privileges Req.None

User InteractionNone

ScopeX

Impact

Confidentiality

Integrity

Availability

CVSS:4.0/AV:N/AC:H/AT:N/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