Authenticated arbitrary file overwrite via escaping symlinks
Published Apr 27, 2026 · Updated Apr 27, 2026
Symlink following in OpenClaw before 2026.3.31 allows remote authenticated users to overwrite files through SSH sandbox uploads. The uploadDirectoryToSshTarget path streamed a local workspace without first rejecting symlinks that resolved beyond its root, redirecting later writes on the SSH host. Exploitation requires low-privilege access to influence the uploaded workspace and an SSH sandbox upload; resulting writes can replace host files or interrupt the remote service.
Summary
What happened
Symlink following in OpenClaw before 2026.3.31 allows remote authenticated users to overwrite files through SSH sandbox uploads. The uploadDirectoryToSshTarget path streamed a local workspace without first rejecting symlinks that resolved beyond its root, redirecting later writes on the SSH host. Exploitation requires low-privilege access to influence the uploaded workspace and an SSH sandbox upload; resulting writes can replace host files or interrupt the remote service.
The record
- CVE
- CVE-2026-41364
- Published
- Apr 27, 2026
- Updated
- Apr 27, 2026
- Vendor
- OpenClaw Foundation
- Product
- OpenClaw
- Classifications
- CWE-59, T1565.001
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Apr 27, 2026CVE publishedPublication date reported by the CVE source.
- Apr 27, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0 <2026.3.31
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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