CVE-2026-77581
- Source
- https://cve.org/CVERecord?id=CVE-2026-77581
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-77581.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-77581
- Aliases
-
- GHSA-5xjf-rr5x-pcfj
- Published
- 2026-09-24T15:23:18Z
- Modified
- 2026-10-28T02:30:43Z
- Severity
-
- 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L CVSS Calculator
- Summary
- BentoPDF: SSRF in cors-proxy-worker.js via DNS-based hostname allowlist bypass
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-918" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77581.json" }- References
-
- https://github.com/alam00000/bentopdf/releases/tag/v2.8.7
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77581.json
- https://github.com/alam00000/bentopdf/security/advisories/GHSA-5xjf-rr5x-pcfj
- https://nvd.nist.gov/vuln/detail/CVE-2026-77581
- https://github.com/alam00000/bentopdf/commit/45496fcd2ed6e02dcdde0d3839cc5024c091760c
- https://github.com/alam00000/bentopdf/commit/58cd1a8893bfe06e4a59a72adc2e7db00a8b9266
Affected packages
Git / github.com/alam00000/bentopdf
Affected ranges
- Type
- GIT
- Repo
- https://github.com/alam00000/bentopdf
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "0" }, { "fixed": "2.8.7" } ], "source": "AFFECTED_FIELD", "strategy": "StringRangeExpression" }, { "range": [ { "fixed": "45496fcd2ed6e02dcdde0d3839cc5024c091760c" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "58cd1a8893bfe06e4a59a72adc2e7db00a8b9266" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v2.8.7", "range": [ { "fixed": "55915a29017a5090a6ea61e61b0f4d899f032923" } ], "source": "REFERENCES_TAG" } ] }