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MEDIUM severity

CVE-2019-5444 — serve-here.js

MEDIUM

CVE-2019-5444 is a medium-severity (CVSS 5.3) Path Traversal vulnerability in serve-here.js. 1 public exploit reference exists, so weaponization risk is real. A fix is available for serve-here.js — see the affected versions and patch details below.

Path Traversal in serve-here.js

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 ↗
1.5%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs74th percentile — riskier than 74% of all scored CVEsHighest risk
0.00%0.67%1.33%2.00%0.2%1.5%Apr 26Aug 26Oct 26

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

How urgent is this, really

CVE-2019-5444 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

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

0other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
serve-here.jsnpm
40downloads / week

Description

Versions of serve-here.js prior to 1.2.0 are vulnerable to path traversal. The package fails to sanitize URLs, allowing attackers to access server files outside of the served folder using relative paths.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmserve-here.jsall versions1.2.0npm install serve-here.js@1.2.0

Affected Products

1 product · 1 configurations
Application
serve-here.jsserve-here.js_project
≤ 1.1.3
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.

Path traversal vulnerability in version up to v1.1.3 in serve-here.js np…

hackerone.comNVDOct 2019

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update serve-here.js to 1.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2019-5444 is resolved across your whole dependency graph.

  3. Workarounds

    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

Versions of serve-here.js prior to 1.2.0 are vulnerable to path traversal. The package fails to sanitize URLs, allowing attackers to access server files outside of the served folder using relative paths.
O3 Security · Impact-Aware SCA

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CVE-2019-5444: serve-here.js — Fixed in 1.2.0