CVE-2024-42471 is a high-severity (CVSS 7.3) Path Traversal vulnerability in github actions toolkit. 1 public exploit reference exists, so weaponization risk is real. O3 Security detects and blocks CVE-2024-42471 exploitation at runtime via eBPF exploit-chain detection and L7 egress monitoring, even on unpatched systems.
actions/artifact is the GitHub ToolKit for developing GitHub Actions. Versions of `actions/artifact` on the 2.x branch before 2.1.2 are vulnerable to arbitrary file write when using…
Description
actions/artifact is the GitHub ToolKit for developing GitHub Actions. Versions of actions/artifact on the 2.x branch before 2.1.2 are vulnerable to arbitrary file write when using downloadArtifactInternal, downloadArtifactPublic, or streamExtractExternal for extracting a specifically crafted artifact that contains path traversal filenames. Users are advised to upgrade to version 2.1.2 or higher. There are no known workarounds for this issue.
Affected Products
actions toolkitgithubactions\/artifactgithubResearch use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
unzip-stream 0.3.1 - Arbitrary File Write
by cybersploit · Apr 30, 2025
Detection & mitigation playbook
Vendor / applianceDetect
Inventory every github actions toolkit deployment and check each version against the affected-products list above. Because the exploit targets the running system rather than your application code, also watch for exploitation at the network and runtime layer — O3 flags the exploit behaviour from runtime telemetry and egress traffic even before a vulnerable build is confirmed.
Fix
Apply the github actions toolkit security patch or hotfix for CVE-2024-42471 on the affected version, following the vendor advisory for your exact build.
Workarounds
Cut exposure now: restrict the management/admin interface to trusted networks, segment the device, and apply the vendor's recommended configuration mitigations and any WAF/IPS signature. O3's runtime protection blocks the exploit chain at execution, holding the line on unpatched or end-of-life systems until you can patch.
How O3 protects you
O3 detects and blocks CVE-2024-42471 exploitation at runtime: eBPF exploit-chain detection, plus L7 egress monitoring that catches the post-exploitation callback and severs the attacker's outbound channel.
Tailored to CVE-2024-42471. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2024-42471 being exploited in your environment?
O3's eBPF runtime sensors and L7 egress monitoring detect and block the CVE-2024-42471 exploit chain at execution — protecting unpatched and end-of-life systems until the vendor patch is applied.