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.NET
.NET NuGet
Not in CISA KEV
MEDIUM severity

CVE-2018-1002205 — DotNetZip

MEDIUMFix: haf/DotNetZip.Semverd@55d2c13

CVE-2018-1002205 is a medium-severity (CVSS 5.5) Path Traversal vulnerability in DotNetZip. EPSS puts its 30-day exploitation probability at 10.4% (96th percentile). A fix is available for DotNetZip — see the affected versions and patch details below.

DotNetZip Zip-Slip Vulnerability

Also known asGHSA-7378-6268-4278SNYK-DOTNET-DOTNETZIP-60245
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Nov 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2018-1002205.

EPSS Exploitation Probability

via FIRST.org ↗
10.4%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs96th percentile — riskier than 96% of all scored CVEsHighest risk
0.00%5.15%10.3%15.5%1.2%10.4%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
.NETDotNetZip

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

Description

DotNetZip.Semvered before 1.11.0 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
.NETNuGetDotNetZipall versions1.11.0dotnet add package DotNetZip --version 1.11.0

Affected Products

1 product · 1 configurations
Application
dotnetzip.semverddotnetzip.semverd_project
< 1.11.0
range

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update DotNetZip to 1.11.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2018-1002205 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

DotNetZip.Semvered before 1.11.0 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'.
O3 Security · Impact-Aware SCA

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CVE-2018-1002205: DotNetZip — Fixed in 1.11.0