CVE-2026-30956: critical vulnerability in oneuptime
OneUptime has authorization bypass via client‑controlled is-multi-tenant-query header
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
28Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 10epss 0.5%
OneUptime is a solution for monitoring and managing online services. Prior to 10.0.21, a low‑privileged user can bypass authorization and tenant isolation in OneUptime v10.0.20 and earlier by sending a forged is-multi-tenant-query header together with a controlled projectid header. Because the server trusts this client-supplied header, internal permission checks in BasePermission are skipped and tenant scoping is disabled. This allows attackers to access project data belonging to other tenants, read sensitive User fields via nested relations, leak plaintext resetPasswordToken, and reset the victim’s password and fully take over the account. This results in cross‑tenant data exposure and full account takeover. This vulnerability is fixed in 10.0.21.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products
OneUptime · oneuptimeRelated CVEs — oneuptime
In the same product, most dangerous first.
CVE-2026-27728CRITICALOneUptime: OS Command Injection in Probe NetworkPathMonitor via unsanitized destination in traceroute exec()EPSS 2.0%CVE-2026-30957CRITICALOneUptime Synthetic Monitor RCE via exposed Playwright browser objectEPSS 1.3%CVE-2026-30958HIGHOneUptime: Path Traversal — Arbitrary File Read (No Auth)EPSS 1.2%CVE-2026-33396CRITICALOneUptime has sandbox escape in Synthetic Monitor Playwright runtime allows project members to execute arbitrary commands on ProbeEPSS 0.8%CVE-2026-32306CRITICALOneUptime ClickHouse SQL Injection via Aggregate Query ParametersEPSS 0.7%CVE-2024-29194HIGHOneUptime Vulnerable to a Privilege Escalation via Local Storage Key ManipulationEPSS 0.7%