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I. Basic Information for CVE-2026-34042
Vulnerability Information

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Vulnerability Title
act: actions/cache server allows malicious cache injection
Source: NVD (National Vulnerability Database)
Vulnerability Description
act is a project which allows for local running of github actions. Prior to version 0.2.86, act's built in actions/cache server listens to connections on all interfaces and allows anyone who can connect to it including someone anywhere on the internet to create caches with arbitrary keys and retrieve all existing caches. If they can predict which cache keys will be used by local actions, they can create malicious caches containing whatever files they please most likely allowing arbitrary remote code execution within the docker container. This issue has been patched in version 0.2.86.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Act 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Act是nektos开源的一个本地运行GitHub Actions的工具。 Act 0.2.86之前版本存在安全漏洞,该漏洞源于内置的actions/cache服务器监听所有接口连接,可能导致任意缓存创建和检索,进而允许在Docker容器内执行任意远程代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
nektosact < 0.2.86 -
II. Public POCs for CVE-2026-34042
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III. Intelligence Information for CVE-2026-34042
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IV. Related Vulnerabilities
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