CVE-2026-34758CWE-306

CVE-2026-34758

Critical · published April 2, 2026

CVSS v3.1

9.1

EPSS

Percentile

41.5

In the wild

Unconfirmed

What it is

OneUptime is an open-source monitoring and observability platform. Prior to version 10.0.42, unauthenticated access to Notification test and Phone Number management endpoints allows SMS/Call/Email/WhatsApp abuse and phone number purchase. This issue has been patched in version 10.0.42.

The record

Technical detail

CVSS v3.1: 9.1 · CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0: Not supplied
EPSS: 0.00495 · 41.5th percentile
Weakness: CWE-306 · Missing Authentication for Critical Function
Published: 2026-04-02T23:21Z

Affected products (1)

Product	Versions	Fixed in
hackerbay/oneuptime	< 10.0.40	10.0.40

References (4)

https://github.com/OneUptime/oneuptime/commit/9adbd04538714740506708d6fa610e433be4d2a4 · [email protected]https://github.com/OneUptime/oneuptime/releases/tag/10.0.42 · [email protected]https://github.com/OneUptime/oneuptime/security/advisories/GHSA-q253-6wcm-h8hp · [email protected]https://github.com/OneUptime/oneuptime/security/advisories/GHSA-q253-6wcm-h8hp · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

02 APR 18:49Z
OneUptime: Missing Authentication on Notification Endpoints
cvelistv5