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TI-2026-68330 Aliases CVE-2026-105686

Repeated chunk uploads in Penpot exhaust temporary media storage

Priority MEDIUM 57CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

Summary

Penpot before 2.18.0 is affected. The chunked media upload handler checks that a chunk index is in range but accepts an index that is already stored, saving it again without replacing the earlier object. The flaw is CWE-770, allocation of resources without limits or throttling. An authenticated user with low privileges can repeat the same valid chunk index, so each request allocates another temporary object, and stored bytes grow beyond the upload's declared size before assembly detects the mismatch.

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, the chunked media upload RPC validates that a chunk index is in range but neither rejects an already stored index nor replaces its previous object. An authenticated user can repeatedly upload the same valid index, causing each successful request to allocate another temporary object and increasing stored bytes beyond the upload session's declared logical size. Assembly detects the inconsistent chunk count only after allocation. This issue is fixed in version 2.18.0.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00329 26th 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 the source description states fixes this issue.

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-2026-105686
  2. 2026-10-06 CISA SSVC decision points changed
  3. 2026-10-06 Priority changed: LOW → MEDIUM

References

Other 3

  • 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