Penpot: Missing authorization in chunked-upload assembly lets another authenticated user consume a victim's upload session

Description

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.

Scores

EPSS (exploitation in 30 days)

0.30% · top 77% of all CVEs (5 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.9.

Weakness

• CWE-862: Missing Authorization (opens in a new tab)All about CWE-862 and its CVEs

Affected products

• penpot · penpot

  • affected < 2.18.0

References (4)

• https://github.com/penpot/penpot/security/advisories/GHSA-5vrm-3c6w-gjfv (opens in a new tab)x_refsource_CONFIRMexploit
• https://github.com/penpot/penpot/pull/11012 (opens in a new tab)x_refsource_MISC
• https://github.com/penpot/penpot/commit/367e4d534c536c33d4f3fbad375f3e9c29b787a6 (opens in a new tab)x_refsource_MISC
• https://github.com/penpot/penpot/releases/tag/2.18.0 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-105695](https://trackcve.app/badge/CVE-2026-105695.svg)](https://trackcve.app/cve/CVE-2026-105695)

Record last updated 5 Oct 2026, 20:40 UTC.