CVE-2026-63630 — BentoPDF: Workflow Import Allows Unvalidated TSA URL Leading to PDF Hash Exfiltration via RFC 3161 Requests

Description (CNA)

BentoPDF is a client-side PDF toolkit that is self hostable. In 2.8.6 and earlier, deserializeWorkflow() accepts the Timestamp node's tsaUrl control from imported JSON without schema or destination validation. When a user imports the crafted workflow and runs it against a PDF, timestampPdf() sends an RFC 3161 TimeStampReq containing the PDF's SHA-256 MessageImprint to the attacker-selected endpoint. The default self-hosted configuration does not set VITE_CORS_PROXY_URL, so the request bypasses the proxy's ALLOWED_TSA_HOSTS checks and is sent directly. The disclosed digest can confirm that a document matches a known file and can correlate the same document across users without revealing its contents. This vulnerability is fixed in 2.8.7.

Affected (CNA)

Vendor / product	Versions
alam00000 / bentopdf	affected < 2.8.7

CWE

CWE-502, CWE-201

References

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/alam00000/bentopdf/security/advisories/GHSA-cx8x-7rrr-r9x8