CVE-2026-121627
Medium
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductJarun Buku
PublishedNov 3, 2026
First seenNov 4, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| jarun buku | 5.0 ≤ v ≤ 5.1.1 | — |
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