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    CVE-2026-43887

    Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, the Outline comment section permits users to mention other users; however, the backend does not validate or sanitize the href attribute associated with these mentions. As a result, potentially dangerous protocols (e.g., javascript:) are not filtered, introducing a risk of client-side code execution. This vulnerability is fixed in 1.7.0.

    Published:May 11, 2026
    Last Modified:May 15, 2026
    EPS:May 11, 2026
    EPSS Score:0.00037
    CVSS Score:7.3

    Affected Products

    Vendor
    Getoutline
    Product
    Outline

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-44695 (CVSS 5.8) — Outline is a service that allows for collaborative documentation. Prior to 1.7.1, the Slack integration callba…
    CVE-2026-43889 (CVSS 6.5) — Outline is a service that allows for collaborative documentation. Prior to 1.7.0, the shares.create API accept…
    CVE-2026-43888 (CVSS 8.7) — Outline is a service that allows for collaborative documentation. Prior to 1.7.0, ZipHelper.extract computes t…
    CVE-2026-43890 (CVSS 7.7) — Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.7.0, the subscriptions.crea…
    CVE-2026-43886 (CVSS 8.2) — Outline is a service that allows for collaborative documentation. From 0.84.0 to 1.6.1, a logic error in OAuth…
    CVE-2026-41649 (CVSS 7.7) — Outline is a service that allows for collaborative documentation. The `shares.create` API endpoint starting in…
    CVE-2026-33640 (CVSS 9.1) — Outline is a service that allows for collaborative documentation. Outline implements an Email OTP login flow f…
    CVE-2026-28506 (CVSS 4.3) — Outline is a service that allows for collaborative documentation. Prior to 1.5.0, the events.list API endpoint…
    CVE-2026-24901 (CVSS 8.1) — Outline is a service that allows for collaborative documentation. Prior to 1.4.0, an Insecure Direct Object Re…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High