CVE-2026-43886 — Outline: OAuth Scope Validation Logic Error Allows Privilege Escalation to Wildcard API Access
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 O…
Published: 2026-05-11 · CVSS: 8.2 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7