CVE-2026-121627

    Dashboard / Vulnerabilities / CVE-2026-121627

    CVE-2026-121627

    Published: 3 Nov 2026Last Modified: 5 Nov 2026

    Summary: buku 5.0 through 5.1.1 Stored XSS via bukuserver Bookmark List URL

    Details: buku 5.0 through 5.1.1 contains a stored cross-site scripting vulnerability in the bukuserver bookmark list that allows attackers to execute script via an unescaped bookmark URL in BookmarkModelView._list_entry(). Attackers can submit a URL containing a double quote and event handler through the unauthenticated /api/bookmarks endpoint to issue same-origin API requests with viewers' credentials.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121627.json, https://nvd.nist.gov/vuln/detail/CVE-2026-121627, https://www.vulncheck.com/advisories/buku-5.0-through-5.1.1-stored-xss-via-bukuserver-bookmark-list-url, https://github.com/jarun/buku/issues/911, https://github.com/jarun/buku, https://github.com/jarun/buku/blob/v5.1.1/bukuserver/views.py#L133

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 44a21122190dc26e2994b83e736046ab20895ca8
    Fixed -None

    Affected versions

    v5.1.1
    v5.1

    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
    CVE-2026-121627 | CVE-DB