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CVE-2026-30956— OneUptime has authorization bypass via client‑controlled is-multi-tenant-query header

Quick assessment

Affected
OneUptime oneuptime
Exploitation
Public or AI PoC available; prioritize validation
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 10.0.21之前版本存在安全漏洞，该漏洞源于授权和租户隔离绕过，可能导致跨租户数据泄露和账户接管。

CVSS 10.0 · Critical EPSS 0.47% · P39
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I. Basic Information for CVE-2026-30956

Vulnerability Information
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Vulnerability Title
OneUptime has authorization bypass via client‑controlled is-multi-tenant-query header
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
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 10.0.21之前版本存在安全漏洞，该漏洞源于授权和租户隔离绕过，可能导致跨租户数据泄露和账户接管。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
OneUptime oneuptime < 10.0.21 -

II. Public POCs for CVE-2026-30956

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8648 chars
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III. Intelligence Information for CVE-2026-30956

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Vendor Advisories for CVE-2026-30956 (1)

Vendor Pages for CVE-2026-30956 (1)

Same Patch Batch · OneUptime · 2026-03-10 · 4 CVEs total

CVE-2026-30957 10.0 CRITICAL OneUptime Synthetic Monitor RCE via exposed Playwright browser object
CVE-2026-30958 7.2 HIGH OneUptime: Path Traversal — Arbitrary File Read (No Auth)
CVE-2026-30959 OneUptime has WhatsApp Resend Verification Authorization Bypass

IV. Related Vulnerabilities

Same product: oneuptime
Same vendor: OneUptime
Same weakness: CWE-285

V. Comments for CVE-2026-30956

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