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

Quick assessment

Affected
OneUptime oneuptime
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OneUptime是OneUptime开源的一个全面的解决方案。用于监控和管理您的在线服务。 OneUptime 10.0.42之前版本存在安全漏洞，该漏洞源于多个通知API端点未注册身份验证中间件，结合公共状态页面API的projectId泄露，可能导致未经身份验证的攻击者购买电话号码并删除所有现有警报号码。

AI Predicted 7.5 Difficulty: Easy EPSS 0.67% · P50

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-34759

Vulnerability Information
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Vulnerability Title
OneUptime: Unauthenticated notification API endpoints - financial abuse via phone number purchase, service disruption, and SMTP credential exposure
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
OneUptime 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OneUptime是OneUptime开源的一个全面的解决方案。用于监控和管理您的在线服务。 OneUptime 10.0.42之前版本存在安全漏洞，该漏洞源于多个通知API端点未注册身份验证中间件，结合公共状态页面API的projectId泄露，可能导致未经身份验证的攻击者购买电话号码并删除所有现有警报号码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OneUptime oneuptime < 10.0.42 -

II. Public POCs for CVE-2026-34759

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III. Intelligence Information for CVE-2026-34759

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Patches & Fixes for CVE-2026-34759 (1)

Vendor Advisories for CVE-2026-34759 (1)

Same Patch Batch · OneUptime · 2026-04-02 · 4 CVEs total

CVE-2026-34758 9.1 CRITICAL OneUptime: Missing Authentication on Notification Endpoints
CVE-2026-34840 8.1 HIGH OneUptime SSO: Multi-Assertion Identity Injection via Decoupled Signature Verification
CVE-2026-35053 OneUptime: Unauthenticated Workflow Execution via ManualAPI

IV. Related Vulnerabilities

Same product: oneuptime
Same vendor: OneUptime
Same weakness: CWE-862

V. Comments for CVE-2026-34759

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