# CVE-2026-105690: Penpot session token replay via logout bypass

Source: https://junglewise.ai/threats/cve-2026-105690-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-2026-105690 · Severity: medium · CVSS 5.9 · Published 2026-10-05

Penpot is an open-source design and prototyping platform that enables collaborative design work. Before version 2.18.0, logging out only cleared the browser cookie but did not revoke the server-side session, allowing an attacker who previously captured a session token to continue making authenticated requests as the victim indefinitely or until the token naturally expires. This permits unauthorized access to the victim's projects, designs, and account data.

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

## Quick answers

**Is CVE-2026-105690 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105690 being exploited in the wild.

**How severe is CVE-2026-105690?** Medium severity, with a CVSS score of 5.9, published 5 October 2026.

**Which products and versions are affected?** Penpot prior to 2.18.0.

**Is there a fix for CVE-2026-105690?** 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-2026-105690 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-105690?** 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 logout function clears the auth-token browser cookie but fails to invalidate the corresponding server-side session due to a code path issue where the session ID is not properly available for deletion. An attacker with a previously captured session token (CWE-613: Insufficient Session Expiration) can replay it to bypass authentication checks. The fix in 2.18.0 corrects the delete function to properly revoke the server-side session when the user logs out.

## Affected products

- Penpot Penpot prior to 2.18.0

## Timeline

- 2026-10-05: disclosed
- 2026-09-23: patched: Version 2.18.0 released

## References

- [https://github.com/penpot/penpot/commit/7c85837290c4e7d6f7d99472b092ad4f7c9d6a97](https://github.com/penpot/penpot/commit/7c85837290c4e7d6f7d99472b092ad4f7c9d6a97)
- [https://github.com/penpot/penpot/releases/tag/2.18.0](https://github.com/penpot/penpot/releases/tag/2.18.0)

## Related threats

- [Penpot authorization bypass in get-page RPC](https://junglewise.ai/threats/cve-2026-105696-penpot-is-an-open-source-design-and-prototyping-platform-prior)
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