{"id":"CVE-2026-102354","summary":"BentoPDF: SSRF via DNS Rebinding (TOCTOU) in Cloudflare CORS Proxy Worker","details":"BentoPDF is a privacy-focused PDF toolkit that runs in the browser. In versions through 2.8.6, cloudflare/cors-proxy-worker.js performs a DNS-over-HTTPS safety check in hostnameResolvesToPrivate(), as used by isValidCertificateUrl() and isValidTsaUrl(), separately from the outbound fetch(targetUrl, ...). In deployments where PROXY_SECRET validation is not enabled, a direct client that controls authoritative DNS can forge the Origin header, supply a certificate, OCSP, CRL, or TSA URL that passes the proxy's accepted path checks, return a public address during validation, and return a private or link-local address during the later fetch. The endpoint can return allowed response bodies to the attacker, but exploitation requires precise timing, redirects and IP-literal obfuscation are blocked, and network reachability limits the target. This vulnerability is fixed in 2.8.7.","aliases":["GHSA-wh78-rcw2-hhg9"],"modified":"2026-10-17T02:30:32.997808194Z","published":"2026-10-14T19:00:13.518Z","database_specific":{"cwe_ids":["CWE-367","CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102354.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/alam00000/bentopdf/releases/tag/v2.8.7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102354.json"},{"type":"ADVISORY","url":"https://github.com/alam00000/bentopdf/security/advisories/GHSA-wh78-rcw2-hhg9"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102354"},{"type":"FIX","url":"https://github.com/alam00000/bentopdf/commit/45496fcd2ed6e02dcdde0d3839cc5024c091760c"},{"type":"FIX","url":"https://github.com/alam00000/bentopdf/commit/58cd1a8893bfe06e4a59a72adc2e7db00a8b9266"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/alam00000/bentopdf","events":[{"introduced":"0"},{"fixed":"55915a29017a5090a6ea61e61b0f4d899f032923"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"2.8.7"}],"source":"AFFECTED_FIELD"}}],"versions":["v2.8.6","v2.8.5","v2.8.4","v2.8.3","v2.8.2","v2.8.1","v2.8.0","v2.7.0","v2.6.0","v2.5.0","v2.4.1","v2.4.0","v2.3.3","v2.3.1","v2.3.0","v2.2.1","v2.2.0","v2.1.0","v2.0.0","v1.16.1","v1.16.0","v1.15.4","v1.15.3","v1.15.1","v1.14.0","v1.11.2","v1.11.1","v1.11.0","v1.10.5","v1.10.4","v1.10.3","v1.10.1","v1.10.0","v1.9.0","v1.8.1","v1.8.0","v1.7.9","v1.7.8","v1.7.7","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.1","v1.7.0","v1.6.2","v1.6.1","v1.6.0","v1.5.1","v1.5.0","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.0","v1.1.5","v1.1.4","v1.1.3","v1.1.2","v1.1.1","v1.1.0","v1.0.2","v1.0.1","v1.0.0","v0.0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-102354.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N"}]}