Shiny for Python is a framework for building interactive web applications in Python. From 1.4.0 until 1.6.4, bookmark restore accepts a client-supplied state_id and joins it into the server-side shiny_bookmarks directory without validating that it is a single safe path segment. An unauthenticated request can use parent-directory segments or an absolute path to make the server open input.json and values.json outside the bookmark store, even when bookmark_store is set to disable. In applications configured with bookmark_store set to server and using ui.input_file(), the restore handler can additionally copy and expose an attacker-selected file from an attacker-selected directory. This issue is fixed in version 1.6.4.
History

Tue, 13 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sun, 11 Oct 2026 12:45:00 +0000

Type Values Removed Values Added
First Time appeared Posit-dev
Posit-dev py-shiny
Vendors & Products Posit-dev
Posit-dev py-shiny

Fri, 09 Oct 2026 20:45:00 +0000

Type Values Removed Values Added
Description Shiny for Python is a framework for building interactive web applications in Python. From 1.4.0 until 1.6.4, bookmark restore accepts a client-supplied state_id and joins it into the server-side shiny_bookmarks directory without validating that it is a single safe path segment. An unauthenticated request can use parent-directory segments or an absolute path to make the server open input.json and values.json outside the bookmark store, even when bookmark_store is set to disable. In applications configured with bookmark_store set to server and using ui.input_file(), the restore handler can additionally copy and expose an attacker-selected file from an attacker-selected directory. This issue is fixed in version 1.6.4.
Title Shiny for Python - Path traversal in bookmark restore
Weaknesses CWE-22
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-09T20:34:39.539Z

Updated: 2026-10-13T18:33:20.463Z

Reserved: 2026-10-09T17:33:15.409Z

Link: CVE-2026-108258

cve-icon Vulnrichment

Updated: 2026-10-13T18:33:16.568Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-09T21:17:03.853

Modified: 2026-10-16T17:25:57.940

Link: CVE-2026-108258

cve-icon Redhat

No data.