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Advisory record · GHSA-47c3-hpmg-7j6p

Shiny for Python has path traversal in bookmark restore

CVSS 6.9 MediumEPSS 0.0036 · 29th percentile

Published by the GitHub Advisory Database at 9 Oct 2026, 20:56 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
shinyPyPI>=1.4.0, <1.6.41.6.4
Identifiers
GHSA-47c3-hpmg-7j6p · CVE-2026-108258 · PYSEC-2026-4300
Weakness (CWE)
CWE-22
Tags
Published
9 Oct 2026
Updated
15 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Shiny for Python versions 1.4.0 through 1.6.3 are vulnerable to path traversal in the bookmark restore feature, which accepts a client-supplied state ID without validation. An unauthenticated remote attacker can make the server probe for and parse `input.json` and `values.json` outside the bookmark directory, and applications using server bookmark storage with file inputs can have attacker-selected files read. Upgrade to shiny 1.6.4. A workaround is to strip the `_state_id_` query parameter at a reverse proxy or load balancer.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.9 Medium 4.0 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 CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0036, the 29th percentile, on 9 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.