{"id":"CVE-2026-123201","published":"2026-11-05T19:17:19.153","lastModified":"2026-11-05T19:17:19.153","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.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/jarun/buku/blob/e232ac357cbba22fe69d6d6dfc0d35512a4cd313/buku.py#L4057-L4084","tags":[]},{"url":"https://github.com/jarun/buku/blob/e232ac357cbba22fe69d6d6dfc0d35512a4cd313/bukuserver/api.py#L97-L105","tags":[]},{"url":"https://github.com/jarun/buku/commit/13f6497afc974f02f1069b760772abe8815d1675","tags":[]},{"url":"https://github.com/jarun/buku/issues/910","tags":[]},{"url":"https://github.com/jarun/buku/pull/916","tags":[]},{"url":"https://www.vulncheck.com/advisories/buku-through-5.1.1-ssrf-via-bukuserver-fetch-data-and-network-handle-api","tags":[]}],"exploitRefs":[{"url":"https://github.com/jarun/buku/blob/e232ac357cbba22fe69d6d6dfc0d35512a4cd313/buku.py#L4057-L4084","tags":[]},{"url":"https://github.com/jarun/buku/blob/e232ac357cbba22fe69d6d6dfc0d35512a4cd313/bukuserver/api.py#L97-L105","tags":[]},{"url":"https://github.com/jarun/buku/commit/13f6497afc974f02f1069b760772abe8815d1675","tags":[]},{"url":"https://github.com/jarun/buku/issues/910","tags":[]},{"url":"https://github.com/jarun/buku/pull/916","tags":[]}],"hasPoc":true,"ai":null}