CVE-2026-123201

MediumCVSS 5.3/10Last modified Nov 12, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-918

Affected software

Vendor	Product	Versions
jarun	buku	<= 5.1.1

References

Timeline

Published: Nov 5, 2026
Last modified: Nov 12, 2026
NVD status: Deferred

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