CVE-2026-123201
Medium
Description
Buku (bukuserver) through 5.1.1 contains an unauthenticated server-side request forgery vulnerability that allows remote attackers to make the server request internal hosts by supplying a url parameter to /api/fetch_data or /api/network_handle. Attackers can target loopback, private, or cloud metadata IP addresses, which pass the weak is_bad_url() check and follow redirects, to discover internal services and read their page titles, descriptions, and keywords.
SeverityMedium
CVSS5.3
Exploit probability—
ProductJarun Buku
PublishedNov 5, 2026
First seenNov 5, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| jarun buku | v ≤ 5.1.1 | — |
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