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CVE WatchNov 3, 2026

CVE-2026-121627

buku 5.0 through 5.1.1 contains a stored cross-site scripting vulnerability in the bukuserver bookmark list that allows attackers to execute

CVSS

6.1

Medium

EPSS

—

KEV

—

Exploit Today

—

0-100

Published: Nov 3, 2026 · Last modified: Nov 3, 2026 · CWE-79

EPSS · 30d

Not enough EPSS history yet.

Technical description

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.

Official references
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CVECVSSEPSSKEVRExploitTitleMod.
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