alam00000 BentoPDF up to 2.8.6 Workflow Deserialization deserializeWorkflow tsaUrl server-side request forgery

Summaryinfo

A vulnerability marked as problematic has been reported in alam00000 BentoPDF up to 2.8.6. This affects the function deserializeWorkflow of the component Workflow Deserialization. Performing a manipulation of the argument tsaUrl results in server-side request forgery. This vulnerability is known as CVE-2026-63630. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in alam00000 BentoPDF up to 2.8.6. This affects the function deserializeWorkflow of the component Workflow Deserialization. The manipulation of the argument tsaUrl with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-63630 since 07/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 2.8.7 eliminates this vulnerability.

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Productinfo

Vendor

• alam00000

Name

• BentoPDF

Version

• 2.8.0
• 2.8.1
• 2.8.2
• 2.8.3
• 2.8.4
• 2.8.5
• 2.8.6

Website

• Product: https://github.com/alam00000/bentopdf/

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