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MEDIUM severity

Arbitrary File Write in adm-zipGHSA-3v6h-hqm4-2rg6

MEDIUMFix: cthackers/adm-zip#212

GHSA-3v6h-hqm4-2rg6 is a medium-severity (CVSS 5.5) Path Traversal vulnerability in adm-zip. 4 public exploit references exist, so weaponization risk is real. A fix is available for adm-zip — see the affected versions and patch details below.

Also known asCVE-2018-1002204
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
4 known
Exploitation data as of Oct 22, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
13.5%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs96th percentile — riskier than 96% of all scored CVEsHighest risk
12.2%14.4%16.6%18.8%17.6%13.5%Apr 26Aug 26Oct 26

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

How urgent is this, really

GHSA-3v6h-hqm4-2rg6 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 394,803 CVEs with a current EPSS score, this one falls in the 10–50% 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.

6Kother npm packages depend on this — each one inherits the vulnerability until it's patched upstream
adm-zipnpm
14.2Mdownloads / week

Description

adm-zip npm library before 0.4.9 is vulnerable to directory traversal, allowing attackers to write to arbitrary files via a ../ (dot dot slash) in a Zip archive entry that is mishandled during extraction. This vulnerability is also known as 'Zip-Slip'.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmadm-zipall versions0.4.11npm install adm-zip@0.4.11

Affected Products

1 product · 1 configurations
Application
adm-zipadm-zip_project
< 0.4.9
range
Exploits & PoCs
4

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

adm-zip npm library before 0.4.9 is vulnerable to directory traversal, a…

snyk.ioNVDOct 2019

adm-zip npm library before 0.4.9 is vulnerable to directory traversal, a…

snyk.ioNVDOct 2019

adm-zip npm library before 0.4.9 is vulnerable to directory traversal, a…

github.comNVDOct 2019

adm-zip npm library before 0.4.9 is vulnerable to directory traversal, a…

github.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 adm-zip, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update adm-zip to 0.4.11 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-3v6h-hqm4-2rg6 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 `adm-zip` before 0.4.9 are vulnerable to arbitrary file write when used to extract a specifically crafted archive that contains path traversal filenames (`../../file.txt` for example). ## Recommendation Update to version 0.4.9 or later.
O3 Security · Impact-Aware SCA

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Arbitrary File Write in adm-zip (Medium 5.5)