CVE-2026-105690: Penpot: Server-side session not invalidated on logout; stale auth-token cookie remains valid for full profile access

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-05 · updated 2026-10-05
Weakness: CWE-613

Description

Penpot is an open-source design and prototyping platform. Prior to 2.18.0, logout clears the browser's auth-token cookie without revoking the corresponding server-side session. A previously captured session token remains usable after the victim logs out and can continue to make authenticated requests with the victim's authority until natural expiration. This issue is fixed in version 2.18.0.

Affected products

penpot: before 2.18.0

References

https://github.com/penpot/penpot/commit/7c85837290c4e7d6f7d99472b092ad4f7c9d6a97
https://github.com/penpot/penpot/releases/tag/2.18.0
https://github.com/penpot/penpot/security/advisories/GHSA-mj9f-5cwq-7p3q

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