Summary
Jenkins Git client Plugin has an OS command injection vulnerability on agents
Jenkins Git client Plugin 6.6.0 and earlier does not correctly escape the workspace directory name when it is embedded into the SSH wrapper script generated by the "Manually provided keys" Git Host Key Verification strategy on Unix agents.
This allows attackers able to control the name of a build’s working directory (e.g. through a build parameter that determines the workspace directory) to inject shell command substitution and execute arbitrary commands on the agent.
This vulnerability only has an impact when attackers can control working directories (e.g., the argument to the dir(…) Pipeline step) while not being able to control the Pipeline itself or the programs or build scripts it executes.
This vulnerability has been reported through the Jenkins Bug Bounty Program sponsored by the European Commission.
Git client Plugin 6.6.1 stores the known_hosts file used by the "Manually provided keys" Git Host Key Verification strategy in the system temporary directory, so the workspace directory name is no longer embedded in the path passed to the generated SSH wrapper script.
Impact
Untrusted input reaches a shell command, allowing arbitrary commands to run on the host. Typical impact: code execution in the application's environment.
CVE-2026-57282 has a CVSS score of 5.0 (Medium). The vector is network-reachable, low privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (6.6.1); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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Frequently Asked Questions
- What is CVE-2026-57282? CVE-2026-57282 is a medium-severity OS command injection vulnerability in org.jenkins-ci.plugins:git-client (maven), affecting versions < 6.6.1. It is fixed in 6.6.1. Untrusted input reaches a shell command, allowing arbitrary commands to run on the host.
- How severe is CVE-2026-57282? CVE-2026-57282 has a CVSS score of 5.0 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of org.jenkins-ci.plugins:git-client are affected by CVE-2026-57282? org.jenkins-ci.plugins:git-client (maven) versions < 6.6.1 is affected.
- Is there a fix for CVE-2026-57282? Yes. CVE-2026-57282 is fixed in 6.6.1. Upgrade to this version or later.
- Is CVE-2026-57282 exploitable, and should I be worried? Whether CVE-2026-57282 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2026-57282 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix CVE-2026-57282? Upgrade
org.jenkins-ci.plugins:git-clientto 6.6.1 or later.