CVE-2026-34759

HIGHNVD 8.18.1—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.1 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 39% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
8.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 8.1Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.1
EG Score
8.1(medium)
EPSS
44.9%
KEV
Not listed

Published

April 2, 2026

Last Modified

April 13, 2026

Advisory Details (3)

Auto-updated Jun 10, 2026
Patch available. Sources: github_commit, github_release, github.
github Patch Available

Unauthenticated notification API endpoints: financial abuse via phone number purchase, service disruption, and SMTP credential exposure · Advisory · OneUptime/oneuptime · GitHub

https://github.com/OneUptime/oneuptime/security/advisories/GHSA-6wc5-rhvj-cx7f
github_release Patch Available

10.0.42

Patch available: OneUptime/oneuptime 10.0.42

https://github.com/OneUptime/oneuptime/releases/tag/10.0.42
github_commit

commit 9adbd0453871 (OneUptime/oneuptime)

Fix landed in OneUptime/oneuptime commit 9adbd0453871 — awaiting tagged release

https://github.com/OneUptime/oneuptime/commit/9adbd04538714740506708d6fa610e433be4d2a4

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-21 15:24 UTCEPSS rescore
  2. 2026-07-20 17:08 UTCEPSS rescore
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  6. 2026-07-17 03:24 UTCOSV refresh
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  1. 2026-06-30 23:22 UTCEPSS rescore
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  18. 2026-06-21 01:59 UTCEPSS rescore
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  21. 2026-06-18 17:52 UTCEPSS rescore
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  23. 2026-06-17 17:53 UTCEPSS rescore
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  25. 2026-06-15 17:49 UTCEPSS rescore
  26. 2026-06-14 23:18 UTCEPSS rescore
  27. 2026-06-13 23:00 UTCEPSS rescore
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  42. 2026-06-05 06:10 UTCEPSS rescore
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  44. 2026-06-04 13:12 UTCEPSS rescore
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  46. 2026-06-02 20:13 UTCEPSS rescore
  47. 2026-06-01 13:52 UTCEPSS rescore
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  55. 2026-05-29 13:44 UTCEPSS rescore
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  68. 2026-05-20 19:20 UTCEG score recompute
  69. 2026-05-20 11:22 UTCEPSS rescore
  70. 2026-05-20 11:22 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-34759?
CVE-2026-34759 is a high vulnerability published on April 2, 2026. 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…
When was CVE-2026-34759 disclosed?
CVE-2026-34759 was first published in the National Vulnerability Database on April 2, 2026, with the most recent update on April 13, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34759 actively exploited?
CVE-2026-34759 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 44.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-34759?
CVE-2026-34759 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-34759?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34759, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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