{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-123201","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","state":"PUBLISHED","assignerShortName":"VulnCheck","dateReserved":"2026-11-05T17:58:50.301Z","datePublished":"2026-11-05T18:16:37.726Z","dateUpdated":"2026-11-05T18:16:37.726Z"},"containers":{"cna":{"providerMetadata":{"orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","shortName":"VulnCheck","dateUpdated":"2026-11-05T18:16:37.726Z"},"datePublic":"2026-11-02T00:00:00.000Z","title":"buku through 5.1.1 SSRF via bukuserver fetch_data and network_handle API","descriptions":[{"lang":"en","value":"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."}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Server-Side Request Forgery (SSRF)","cweId":"CWE-918","type":"CWE"}]}],"affected":[{"vendor":"jarun","product":"buku","defaultStatus":"unaffected","versions":[{"version":"0","lessThanOrEqual":"5.1.1","status":"affected","versionType":"custom"}],"packageURL":"pkg:pypi/buku","repo":"https://github.com/jarun/buku"}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"}}],"references":[{"url":"https://github.com/jarun/buku/issues/910","tags":["issue-tracking"]},{"url":"https://github.com/jarun/buku/pull/916","tags":["patch","issue-tracking"]},{"url":"https://github.com/jarun/buku/commit/13f6497afc974f02f1069b760772abe8815d1675","tags":["patch"]},{"url":"https://github.com/jarun/buku/blob/e232ac357cbba22fe69d6d6dfc0d35512a4cd313/bukuserver/api.py#L97-L105","tags":["technical-description"]},{"url":"https://github.com/jarun/buku/blob/e232ac357cbba22fe69d6d6dfc0d35512a4cd313/buku.py#L4057-L4084","tags":["technical-description"]},{"name":"VulnCheck Advisory: buku through 5.1.1 SSRF via bukuserver fetch_data and network_handle API","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/buku-through-5.1.1-ssrf-via-bukuserver-fetch-data-and-network-handle-api"}],"credits":[{"lang":"en","value":"George Chen","type":"finder"},{"lang":"en","value":"LeXofLeviafan","type":"remediation developer"}],"x_generator":{"engine":"vulncheck-endgame"}}}}