EUVD-2026-17383Severity by source
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Blast Radius
ecosystem impact- 3 npm packages depend on openclaw (3 direct, 0 indirect)
Ecosystem-wide dependent count for version 2026.3.11.
DescriptionCVE.org
OpenClaw before 2026.3.11 contains a sandbox boundary bypass vulnerability in the fs-bridge writeFile commit step that uses an unanchored container path during the final move operation. An attacker can exploit a time-of-check-time-of-use race condition by modifying parent paths inside the sandbox to redirect committed files outside the validated writable path within the container mount namespace.
AnalysisAI
OpenClaw before 2026.3.11 allows authenticated local attackers to bypass sandbox boundaries and write files outside validated paths via a time-of-check-time-of-use race condition in the fs-bridge writeFile commit operation. An attacker with local access and sufficient privileges can exploit unanchored container paths during file move operations to redirect committed files outside the sandbox, achieving arbitrary file write capabilities within the container mount namespace. No public exploit code or active exploitation has been confirmed.
Technical ContextAI
OpenClaw's fs-bridge module implements a sandboxed file writing mechanism that validates destination paths before committing file operations. The vulnerability exists in CWE-367 (Time-of-check-time-of-use race condition) where the final move operation uses an unanchored container path. During the window between path validation and the actual file move, an authenticated local attacker can modify parent directories within the sandbox to create symbolic links or alter path components, causing the move operation to write the file to an unvalidated location outside the intended writable sandbox boundary. This bypasses the container's mount namespace isolation and allows unauthorized file writes to sensitive locations.
RemediationAI
Upgrade OpenClaw to version 2026.3.11 or later, which addresses the unanchored path issue in the fs-bridge writeFile commit operation. The primary fix involves anchoring container paths during the move operation to prevent race condition exploitation. Until patching is possible, restrict local access to OpenClaw and container environments to trusted users, implement filesystem monitoring to detect suspicious path modifications during file operations, and review container security policies to limit privilege levels of users who can interact with the fs-bridge module. Refer to the GitHub security advisory at https://github.com/openclaw/openclaw/security/advisories/GHSA-xvx8-77m6-gwg6 for detailed patch information.
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External POC / Exploit Code
Leaving vuln.today