CVE-2026-43886 Details
Description
Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, a logic error in OAuthInterface.validateScope() uses Array.some() to validate requested OAuth scopes, causing the function to accept the entire scope array if any single scope is valid. An attacker can smuggle the wildcard * scope by requesting scope=read *, escalating a read-only OAuth token to full unrestricted API access including write, delete, and admin operations. This vulnerability is fixed in 1.7.0.
A logic error has been identified in the OAuth scope validation process of the Outline application, specifically in versions 0.84.0 prior to 1.6.1. The issue arises in the 'validateScope' function, which improperly uses 'Array.some()' to validate requested OAuth scopes. This flaw allows an attacker to introduce the wildcard scope by requesting 'scope=read *', thereby escalating a read-only OAuth token to full unrestricted API access, including write, delete, and admin privileges. The vulnerability has been patched in version 1.7.0.
Users are advised to update to Outline version 1.7.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 11, 2026CISA-ADP
Assessed May 12, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/outline/outline/security/advisories/GHSA-7732-6qrg-wjf4 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/outline/outline/security/advisories/GHSA-7732-6qrg-wjf4 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-269 | Improper Privilege Management | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Outline | >= 0.84.0, <= 1.6.1 (semver) |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 12, 2026 | CVE Modified | CISA-ADP |
| May 11, 2026 | New CVE Received | [email protected] |