{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-77581", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-20T20:35:30.148Z", "datePublished": "2026-09-24T15:23:18.550Z", "dateUpdated": "2026-09-24T15:37:29.237Z"}, "containers": {"cna": {"title": "BentoPDF: SSRF in cors-proxy-worker.js via DNS-based hostname allowlist bypass", "problemTypes": [{"descriptions": [{"cweId": "CWE-918", "lang": "en", "description": "CWE-918: Server-Side Request Forgery (SSRF)", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L", "version": "3.1"}}], "references": [{"name": "https://github.com/alam00000/bentopdf/security/advisories/GHSA-5xjf-rr5x-pcfj", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/alam00000/bentopdf/security/advisories/GHSA-5xjf-rr5x-pcfj"}, {"name": "https://github.com/alam00000/bentopdf/commit/45496fcd2ed6e02dcdde0d3839cc5024c091760c", "tags": ["x_refsource_MISC"], "url": "https://github.com/alam00000/bentopdf/commit/45496fcd2ed6e02dcdde0d3839cc5024c091760c"}, {"name": "https://github.com/alam00000/bentopdf/commit/58cd1a8893bfe06e4a59a72adc2e7db00a8b9266", "tags": ["x_refsource_MISC"], "url": "https://github.com/alam00000/bentopdf/commit/58cd1a8893bfe06e4a59a72adc2e7db00a8b9266"}, {"name": "https://github.com/alam00000/bentopdf/releases/tag/v2.8.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/alam00000/bentopdf/releases/tag/v2.8.7"}], "affected": [{"vendor": "alam00000", "product": "bentopdf", "versions": [{"version": "< 2.8.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-09-24T15:23:18.550Z"}, "descriptions": [{"lang": "en", "value": "BentoPDF is a client-side PDF toolkit that is self hostable. In 2.8.6 and earlier, the certificate and timestamp CORS proxy in cloudflare/cors-proxy-worker.js uses isPrivateOrReservedHost() to validate a supplied hostname separately from the DNS resolution used by fetch(targetUrl), allowing an attacker-controlled hostname to resolve to an internal or reserved destination after validation. A certificate-like path can satisfy ALLOWED_PATH_PATTERNS, and direct clients can forge the browser-oriented Origin header. Deployments without PROXY_SECRET skip the optional signature check, while the signature is an anti-abuse measure rather than a destination-security boundary. The proxy has a 10 MB response limit and can relay response bodies from reachable destinations. The advisory identifies both the official Worker deployment and self-hosted instances as impacted where the Worker execution environment can reach internal or reserved destinations. This vulnerability is fixed in 2.8.7."}], "source": {"advisory": "GHSA-5xjf-rr5x-pcfj", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/alam00000/bentopdf/security/advisories/GHSA-5xjf-rr5x-pcfj", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-24T15:37:09.697885Z", "id": "CVE-2026-77581", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-24T15:37:29.237Z"}}]}}

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