CVE-2026-63630
lowBentoPDF is a client-side PDF toolkit that is self hostable.
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/alam00000/bentopdf/commit/b21f602cca972320bfffbf72e37df535313a6e48 security-advisories@github.com
- https://github.com/alam00000/bentopdf/releases/tag/v2.8.7 security-advisories@github.com
- https://github.com/alam00000/bentopdf/security/advisories/GHSA-cx8x-7rrr-r9x8 security-advisories@github.com
- https://github.com/alam00000/bentopdf/security/advisories/GHSA-cx8x-7rrr-r9x8 134c704f-9b21-4f2e-91b3-4a467353bcc0