CVE-2026-63630Public exploitNetwork attack vectorHinoki check available

PDF hash disclosure via unvalidated timestamp endpoint

Published Sep 24, 2026 · Updated Sep 24, 2026

Information disclosure in BentoPDF 2.8.6 and earlier allows remote attackers to expose a PDF's SHA-256 digest via a crafted workflow. deserializeWorkflow() assigns the imported Timestamp node's tsaUrl without schema or destination validation, and timestampPdf() sends the digest there in an RFC 3161 request. Exploitation requires a user to import the workflow and run it against a PDF; the digest reveals no contents but identifies known or repeated documents.

CVSS severity3.4
Low
EPSS probability0.31%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Information disclosure in BentoPDF 2.8.6 and earlier allows remote attackers to expose a PDF's SHA-256 digest via a crafted workflow. deserializeWorkflow() assigns the imported Timestamp node's tsaUrl without schema or destination validation, and timestampPdf() sends the digest there in an RFC 3161 request. Exploitation requires a user to import the workflow and run it against a PDF; the digest reveals no contents but identifies known or repeated documents.

The record

CVE
CVE-2026-63630
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
BentoPDF
Product
BentoPDF
Classifications
T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.8.7

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BentoPDF · BentoPDFversion=< 2.8.7

Published CVSS scores

3.4GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1204.002User Execution: Malicious File

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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