CVE-2026-41653Public exploitNetwork attack vector

Arbitrary JavaScript execution via unsanitized Markdown preview

Published May 7, 2026 · Updated May 7, 2026

Cross-site scripting in BentoPDF before 2.8.3 allows remote attackers to execute arbitrary JavaScript through a crafted Markdown file. The Markdown editor enables raw HTML in markdown-it and assigns rendered output to preview.innerHTML without sanitization. Exploitation requires a user to open attacker-controlled Markdown; injected code runs in the application origin and can read files opened in BentoPDF.

CVSS severity7.0
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in BentoPDF before 2.8.3 allows remote attackers to execute arbitrary JavaScript through a crafted Markdown file. The Markdown editor enables raw HTML in markdown-it and assigns rendered output to preview.innerHTML without sanitization. Exploitation requires a user to open attacker-controlled Markdown; injected code runs in the application origin and can read files opened in BentoPDF.

The record

CVE
CVE-2026-41653
Published
May 7, 2026
Updated
May 7, 2026
Vendor
BentoPDF
Product
BentoPDF
Classifications
CWE-79, CWE-116, T1204.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 7, 2026CVE publishedPublication date reported by the CVE source.
  2. May 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 2.8.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

BentoPDF · BentoPDFversion=< 2.8.3

Published CVSS scores

7.0GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA: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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116Improper Encoding or Escaping of Output
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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Your stack

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