Critical 9.2Published Apr 2, 2026

CVE-2026-34759OneUptime: Unauthenticated notification API endpoints - financial abuse via phone number purchase, service disruption, and SMTP credential exposure

Updated under an hour ago (Oct 27, 2026, 12:23 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 9.2 CRITICAL (v4.0, CNA)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
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Apr 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

OneUptime oneuptime oneuptime:oneuptime (from the name)	before 10.0.42	CNA record
hackerbay oneuptime hackerbay:oneuptime	before 10.0.42	NVD

References

References

https://github.com/OneUptime/oneuptime/security/advisories/GHSA-6wc5-rhvj-cx7f	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/OneUptime/oneuptime/commit/9adbd04538714740506708d6fa610e433be4d2a4	x-refsource-misc, patch
https://github.com/OneUptime/oneuptime/releases/tag/10.0.42	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.