CVE-2026-47666Public exploitNetwork attack vectorHinoki check available

Stored XSS via unescaped custom font name

Published Aug 26, 2026 · Updated Aug 27, 2026

Stored XSS in Penpot 2.14.3 and earlier allows remote authenticated users to execute JavaScript through a custom font family name. The backend stores an unrestricted font-family value, and the frontend interpolates it into an @font-face rule before writing the style with innerHTML. Opening a file that references the malicious font triggers code on the Penpot origin, exposing the victim's session and accessible files and projects.

CVSS severity7.6
High
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Stored XSS in Penpot 2.14.3 and earlier allows remote authenticated users to execute JavaScript through a custom font family name. The backend stores an unrestricted font-family value, and the frontend interpolates it into an @font-face rule before writing the style with innerHTML. Opening a file that references the malicious font triggers code on the Penpot origin, exposing the victim's session and accessible files and projects.

The record

CVE
CVE-2026-47666
Published
Aug 26, 2026
Updated
Aug 27, 2026
Vendor
Penpot
Product
Penpot
Classifications
CWE-79, T1204.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=< 2.15.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Penpot · Penpotversion=< 2.15.3

Published CVSS scores

7.6GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
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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