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TI-2026-68339 Aliases CVE-2026-105695

Missing authorization in Penpot chunk assembly exposes uploaded files

Priority MEDIUM 60CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
Security bypass
Confidentiality · integrity · availability
High · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

Penpot versions before 2.18.0 are affected. The assemble-chunks operation looks up an upload session by its session ID alone, without checking the owner, which is CWE-862, missing authorization. An authenticated user who obtains another user's live, completed session UUID can assemble that user's chunks into their own file, team font, or project import. This discloses the uploaded bytes and deletes the victim's pending session.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Penpot is an open-source design and prototyping platform. Prior to 2.18.0, assemble-chunks retrieves an upload session using only its session ID, while upload-chunk correctly scopes the lookup to the authenticated profile. An authenticated user who obtains another user's live, completed upload-session UUID can assemble the victim's chunks into the attacker's own file, team font, or project import, disclosing the uploaded bytes and deleting the victim's pending session. This issue is fixed in version 2.18.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00299 22nd percentileScored 2026-11-07
Fix Fixed penpot (penpot): 2.18.0

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 2.18.02.18.0Patch availableCNA
  • penpot Vendorpenpot Affected before 2.18.0 Fixed in 2.18.0 Patch available CNA

Remediation

Upgrade Penpot to version 2.18.0, which fixes this issue. The sources do not list a vendor advisory for this fix.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA penpot (penpot) Fixed in 2.18.0

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-105695

References

Other 4

  • 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