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TI-2026-35173 Aliases CVE-2026-47666

Penpot: Stored XSS via custom font family name injected into a @font-face style rule

Priority HIGH 66CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
High · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Penpot is an open-source design and prototyping platform. In versions up to and including 2.14.3, Penpot is vulnerable to stored cross-site scripting through custom font family names, which are interpolated into a @font-face CSS rule and injected into the page as HTML without sanitization. Because the backend accepts an arbitrary font-family string and the frontend writes the resulting style through innerHTML, a name containing markup such as a closing style tag followed by a script can break out of the style element and execute JavaScript on the Penpot origin. The attack is passive: any team member who opens a file referencing the malicious font triggers script execution simply by rendering the page, allowing theft of session cookies, actions performed as the victim, and access to their files and projects. This issue is fixed in version 2.15.3.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00347 28th percentileScored 2026-11-07
Fix Fixed penpot (penpot): 2.15.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
penpotpenpotbefore 2.15.32.15.3Patch availableCNA
  • penpot Vendorpenpot Affected before 2.15.3 Fixed in 2.15.3 Patch available CNA

Remediation

  • Fix · CNA penpot (penpot) Fixed in 2.15.3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-47666

References

Other 2

  • TI-2026-68335 OS command injection in Penpot SVG exporter via fill color CVSS 3.1CRITICAL 9.9
  • TI-2026-32845 Penpot: Pre-authenticated account takeover via team-invitation token + prepare-register-profile CVSS 3.1CRITICAL 9.9
  • TI-2026-35172 Penpot: Stored XSS via comment content, innerHTML renders unsanitized HTML CVSS 3.1HIGH 8.7
  • TI-2026-33540 Penpot: MCP REPL server binds to 0.0.0.0 with unauthenticated /execute endpoint — RCE CVSS 3.1HIGH 8.8
  • TI-2026-14441 Missing authorization in Penpot CVSS 3.1HIGH 7.5
  • TI-2026-33541 Penpot: Authenticated SSRF in remote image import via create-file-media-object-from-url CVSS 3.1HIGH 7.7
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences