How broadly exploitable is this vulnerability?

This issue is broadly exploitable by any authenticated, low‑privileged user who can send crafted HTTP requests with custom headers. Because tenant scoping can be disabled or altered, a compromise of a single low‑privileged account may enable access to other tenants' data and accounts.

Does exploitation require elevated privileges or admin access?

No. The vulnerability can be leveraged by low‑privileged accounts. The flaw lies in the permission system's trust of client‑controlled headers, not in a privileged feature; thus, even basic users can potentially gain cross‑tenant access and perform account takeovers.

What is the safest general fix pattern for developers?

The safest fix is to remove all reliance on client‑supplied headers or parameters for authorization decisions and tenant selection. Tenant and project context should be derived solely from the authenticated session or signed tokens, and every resource access must verify that the resource's tenant matches the caller's tenant, denying access by default when there is any mismatch or ambiguity.

Severity:

CRITICAL RISK

(9.9)

Improper Authorization Bypass (CWE-285) via Trusted Headers in OneUptime Multi‑Tenant Access Control

CVE-2026-30956

Published:

Mar 10, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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May 6, 2026

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HIGH RISK

HIGH

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Privilege Escalation via Bypassed Access Control

May 6, 2026

Vulnerability Type

Category:

Improper Authorization

CWE:

CWE-285;CWE-862

Impact:

Cross-Tenant Data Exposure and Account Takeover

Severity:

CRITICAL RISK

(9.9)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Authorization

CWE:

CWE-285;CWE-862

Impact:

Cross-Tenant Data Exposure and Account Takeover

Severity:

CRITICAL RISK

(9.9)

CVSS Version:

3.1

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Improper Authorization Bypass (CWE-285) via Trusted Headers in OneUptime Multi‑Tenant Access Control

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(8.6)

Server-Side Request Forgery (CWE-918) in OpenClaw Zalo Plugin sendPhoto

HIGH RISK

HIGH

(8.8)

Authorization Bypass (CWE-863) in OpenClaw Matrix Room Control Commands

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Ship clean & secure code faster

Ship clean & secure code faster

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