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Not in CISA KEV
HIGH severity

CVE-2022-0409 — showdoc

HIGHFix: star7th/showdoc@7383d7a

CVE-2022-0409 is a high-severity (CVSS 7.2) Unrestricted File Upload vulnerability in showdoc/showdoc. 1 public exploit reference exists, so weaponization risk is real. A fix is available for showdoc/showdoc — see the affected versions and patch details below.

Unrestricted Upload of File with Dangerous Type in star7th/showdoc

Also known asGHSA-6x3j-x9rp-whxp
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.9%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs60th percentile — riskier than 60% of all scored CVEsHighest risk
0.00%0.48%0.96%1.44%0.2%0.9%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2022-0409 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected
🐘showdoc/showdoc

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

Description

Unrestricted Upload of File with Dangerous Type in Packagist showdoc/showdoc prior to 2.10.2.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
🐘Packagistshowdoc/showdocall versions2.10.2composer require showdoc/showdoc:^2.10.2

Affected Products

1 product · 1 configurations
Application
showdocshowdoc
< 2.10.2
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.

Unrestricted Upload of File with Dangerous Type in Packagist showdoc/sho…

huntr.devNVDMar 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 showdoc/showdoc, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update showdoc/showdoc to 2.10.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2022-0409 is resolved across your whole dependency graph.

  3. Workarounds

    Treat uploaded files as untrusted until proven otherwise: validate the actual content type rather than the supplied extension, store uploads outside the web root on a volume mounted without execute permission, and rename them to server-generated identifiers so an attacker cannot choose the path a request will later resolve.

Frequently Asked Questions

showdoc prior to 2.10.2 is vulnerable to Unrestricted Upload of File with Dangerous Type.
O3 Security · Impact-Aware SCA

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CVE-2022-0409: showdoc — Fixed in 2.10.2