Vulnerability DatabaseCVE-2026-121627
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CVE-2026-121627
Published:November 03, 2026
Updated:November 04, 2026
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.
Related Resources (6)
https://github.com/jarun/buku/blob/v5.1.1/bukuserver/views.py#L133
https://github.com/jarun/buku/issues/911
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/121xxx/CVE-2026-121627.json
https://www.vulncheck.com/advisories/buku-5.0-through-5.1.1-stored-xss-via-bukuserver-bookmark-list-url
https://github.com/jarun/buku
https://nvd.nist.gov/vuln/detail/CVE-2026-121627
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CVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation
CWE-79
EPSS
Base Score:
0.19