CVE-2026-63630: ALAM00000 Bentopdf

Low severity, CVSS 3.4. EPSS: 0.3% chance of exploitation in the next 30 days.

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 products

• ALAM00000 Bentopdf: before 2.8.7 (fixed in 2.8.7)

Published 2026-09-24. Last modified 2026-09-30.