# CVE-2026-105695: Penpot authorization bypass in upload chunk assembly

Source: https://junglewise.ai/threats/cve-2026-105695-penpot-is-an-open-source-design-and-prototyping-platform-prior  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-05. Updated: 2026-10-05  
License: CC BY 4.0 with a link back

CVE-2026-105695 · Severity: medium · CVSS 5.9 · Published 2026-10-05

Penpot is an open-source design and prototyping platform used by teams to collaborate on digital assets. Prior to version 2.18.0, an authenticated attacker could access and assemble another user's uploaded file chunks by obtaining their session ID, allowing the attacker to steal the uploaded content and delete the victim's pending upload session.

Technologies: [Penpot](https://junglewise.ai/threats/technologies/penpot). Vendors: [Penpot](https://junglewise.ai/threats/vendors/penpot).

## Quick answers

**Is CVE-2026-105695 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105695 being exploited in the wild.

**How severe is CVE-2026-105695?** Medium severity, with a CVSS score of 5.9, published 5 October 2026.

**Which products and versions are affected?** Penpot before 2.18.0.

**Is there a fix for CVE-2026-105695?** Yes: fixed in 2.18.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-105695 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-105695?** Check whether you run Penpot at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 2.18.0

## Technical details

The assemble-chunks function failed to scope the upload session lookup to the authenticated user's profile, relying only on the session ID for verification. An authenticated attacker who obtains a victim's live, completed upload-session UUID can assemble those chunks into their own file, team font, or project import, disclosing the uploaded bytes and deleting the victim's session. The fix adds profile-id parameter validation to assemble-chunks and all callers (assemble-file-media-object, create-font-variant, import-binfile) to match the security model already implemented in upload-chunk.

## Affected products

- Penpot Penpot before 2.18.0

## Timeline

- 2026-10-05: disclosed
- 2026-08-18: patched

## References

- [https://github.com/penpot/penpot/commit/367e4d534c536c33d4f3fbad375f3e9c29b787a6](https://github.com/penpot/penpot/commit/367e4d534c536c33d4f3fbad375f3e9c29b787a6)
- [https://github.com/penpot/penpot/pull/11012](https://github.com/penpot/penpot/pull/11012)

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