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CVE-2026-108258

Shiny for Python - Path traversal in bookmark restore PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / productVersions
posit-dev / py-shinyaffected >= 1.4.0, < 1.6.4

CWE

CWE-22

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.