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CVE-2026-43886

Outline: OAuth Scope Validation Logic Error Allows Privilege Escalation to Wildcard API Access PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
outline / outlineaffected >= 0.84.0, < 1.7.0

CWE

CWE-269

References

ADP enrichment

CISA-ADP

No English description supplied.