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CRITICAL severity

CVE-2022-31573 — chainerrl-visualizer

CRITICAL

CVE-2022-31573 is a critical-severity (CVSS 9.3) Path Traversal vulnerability in chainerrl-visualizer. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

ChainerRL Visualizer 0.1.1 vulnerable to Path Traversal via unsafe use of send_file function

Also known asGHSA-687h-86vc-5x59PYSEC-2026-309
Published
Updated
Affected
1 pkg
Patched
See advisory
Exploits
1 known
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.4%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs73th percentile — riskier than 73% of all scored CVEsHighest risk
0.00%0.63%1.27%1.90%0.4%1.4%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Real-World Exposure

1 pkg affected
🐍chainerrl-visualizer

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects PyPI packages — download data is not available via public APIs for these ecosystems.

Description

The chainer/chainerrl-visualizer repository through 0.1.1 on GitHub allows absolute path traversal because the Flask send_file function is used unsafely.

Affected Packages

1 total
EcosystemPackageVulnerable rangeFix
🐍PyPIchainerrl-visualizerall versionsNo fix

Affected Products

1 product · 1 configurations
Application
chainerrl-visualizerchainer
≤ 0.1.1
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The chainer/chainerrl-visualizer repository through 0.1.1 on GitHub allo…

github.comNVDJul 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for chainerrl-visualizer, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Remediation status

    The records we use list no patched version of chainerrl-visualizer for CVE-2022-31573. Check the maintainer's advisory, and where your build allows, override or pin the dependency away from the vulnerable range.

  3. Mitigate without a patch

    Resolve every user-supplied path to its canonical form and reject anything that escapes the intended directory, and run the component under an account that has no read or write access outside the directory it legitimately serves.

Frequently Asked Questions

The chainer/chainerrl-visualizer repository through 0.1.1 on GitHub allows absolute path traversal because the Flask send_file function is used unsafely.
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CVE-2022-31573: chainerrl Path Traversal (Critical 9.3)