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MEDIUM severity

CVE-2016-5725 — jsch

MEDIUM

CVE-2016-5725 is a medium-severity (CVSS 5.9) Path Traversal vulnerability in com.jcraft:jsch. 1 public exploit or proof-of-concept reference is indexed, so weaponization risk is real. A fix is available for com.jcraft:jsch — see the affected versions and patch details below.

Improper Limitation of a Pathname to a Restricted Directory in JCraft JSch

Also known asGHSA-q446-82vq-w674
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
24.1%probability of exploitation in next 30 days
Moderate Risk0.00%
Lower risk than most CVEs98th percentile — riskier than 98% of all scored CVEsHighest risk
22.4%25.5%28.6%31.6%29.9%24.1%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
☕com.jcraft:jsch

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

Description

Directory traversal vulnerability in JCraft JSch before 0.1.54 on Windows, when the mode is ChannelSftp.OVERWRITE, allows remote SFTP servers to write to arbitrary files via a ..\ (dot dot backslash) in a response to a recursive GET command.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
☕Mavencom.jcraft:jschall versions0.1.54com.jcraft:jsch:0.1.54

Affected Products

1 product · 1 configurations
Application
jschjcraft
≤ 0.1.53
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.

EDB-40411doswindows✓ Verified

JCraft/JSch Java Secure Channel 0.1.53 - Recursive sftp-get Directory Traversal

by tintinweb · Sep 22, 2016

Exploit-DB Source

Detection & mitigation playbook

Open-source dependency

  1. Detect

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

  2. Fix

    Update com.jcraft:jsch to 0.1.54 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2016-5725 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.

Fixing This On Your OS

If you run this on a Linux distribution, patch through your package manager against the distro's own security advisory below — it tracks the exact backported fix for your release, which can ship on a different timeline (and sometimes a different severity) than the upstream project.

Red HatModerate
RHSA-2017:3115Red Hat JBoss A-MQ 6.3

Frequently Asked Questions

Directory traversal vulnerability in JCraft JSch before 0.1.54 on Windows, when the mode is ChannelSftp.OVERWRITE, allows remote SFTP servers to write to arbitrary files via a ..\ (dot dot backslash) in a response to a recursive GET command.
O3 Security · Impact-Aware SCA

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CVE-2016-5725: jsch Path Traversal — Fixed in 0.1.54