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Penpot: Repeated chunk index causes temporary-storage amplification

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-105686

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-105686

penpot

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "penpot",
    "product": "penpot",
    "versions": [
      {
        "status": "affected",
        "version": "< 2.18.0"
      }
    ]
  }
]
Related CVEs
CVE-2026-105686

Source reference: /cveMetadata/cveId

Publisher severity

medium

Source reference: /containers/cna/metrics

Event
#9397 · Revision 1
Added to Heist Feed
Publisher date
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