CVE-2026-43886
Last modified
CVE-2026-43886 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. 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. EPSS estimates a 0.21% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:H/A:N
Weakness Enumeration
References
Timeline
- Published
- Last Modified
- Status
- Deferred
Frequently Asked Questions
What is CVE-2026-43886?
How severe is CVE-2026-43886?
How do I fix CVE-2026-43886?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-43880WWBN AVideo is an open source video platform. In versions up…5.3
- CVE-2026-43881WWBN AVideo is an open source video platform. In versions up…5.3
- CVE-2026-43882WWBN AVideo is an open source video platform. In versions up…4.3
- CVE-2026-43883WWBN AVideo is an open source video platform. In versions up…4.2
- CVE-2026-43884WWBN AVideo is an open source video platform. In versions up…7.7
- CVE-2026-43885WWBN AVideo is an open source video platform. In versions up…7.7
- CVE-2026-43887Outline is a service that allows for collaborative documenta…7.3
- CVE-2026-43888Outline is a service that allows for collaborative documenta…8.7
- CVE-2026-43889Outline is a service that allows for collaborative documenta…6.5
- CVE-2026-4389The DSGVO snippet for Leaflet Map and its Extensions plugin …6.4
- CVE-2026-43890Outline is a service that allows for collaborative documenta…7.7
- CVE-2026-43891changedetection.io is a free open source web page change det…7.5
Are you affected by CVE-2026-43886?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST