Critical severity · published Apr 2, 2026
CVE-2026-34758
OneUptime: Missing Authentication on Notification Endpoints
9.1
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ON
oneuptime · OneUptime
< 10.0.42 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-34758
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-34758
Patch
https://github.com/OneUptime/oneuptime/commit/9adbd04538714740506708d6fa610e433be4d2a4
Release Notes
https://github.com/OneUptime/oneuptime/releases/tag/10.0.42
Exploit
https://github.com/OneUptime/oneuptime/security/advisories/GHSA-q253-6wcm-h8hp
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