EUVD-2026-66091
GHSA-5fw2-g8r8-hr39
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Network-reachable REST policy bypass requiring low-privilege authentication; Changed Scope reflects crossing the policy enforcement trust boundary; C:H for protected resource access, I:L for limited REST write exposure, A:N.
Primary rating from Vendor (nvidia).
CVSS VectorVendor: nvidia
Lifecycle Timeline
2DescriptionCVE.org
NVIDIA OpenShell Sandbox for Linux contains a vulnerability where an attacker could cause a path traversal bypass of L7 REST network policy. A successful exploit of this vulnerability might lead to information disclosure and data tampering.
Articles & Coverage 1
AnalysisAI
Path traversal in NVIDIA OpenShell Sandbox for Linux permits low-privileged network-authenticated attackers to bypass L7 REST network policy enforcement, reaching REST endpoints that policy rules were designed to block. The Changed Scope (S:C) in the CVSS vector signals that the real impact falls on downstream services or data stores protected by the bypassed policy, yielding high confidentiality exposure (C:H) and limited integrity impact (I:L) on resources outside the sandbox trust boundary. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold low-privilege authenticated access to the L7 REST policy enforcement layer of NVIDIA OpenShell Sandbox, as confirmed by CVSS PR:L - unauthenticated external parties cannot directly exploit this vulnerability without first obtaining credentials or a valid session token. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 8.5 (AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N) is the dominant quantitative signal available and accurately reflects the exploit conditions: network-reachable, low attack complexity, and a scope change that elevates effective impact beyond the sandbox perimeter. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Consult NVIDIA's product security advisory at https://github.com/NVIDIA/product-security/tree/main/2026/5872 for the specific patched release - no fix version has been confirmed in currently available public data, so the advisory is the authoritative source. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all OpenShell Sandbox for Linux deployments and map which downstream services or databases are protected by L7 REST policy rules; determine exposure level based on network accessibility. …
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Privilege escalation and remote code execution in NVIDIA OpenShell for Linux stem from an incomplete deny-list in its sa
Sandbox escape in NVIDIA OpenShell for Linux lets a low-privileged actor already operating inside the sandbox break its
OS command injection in NVIDIA OpenShell across all supported platforms allows a network-accessible malicious gateway to
OS command injection in NVIDIA OpenShell for Linux's sandbox exec handler allows a low-privileged, network-accessible at
Improper output encoding in NVIDIA OpenShell's inference proxy on Linux allows a local low-privileged attacker to cause
Same weakness CWE-22 – Path Traversal
View allSame technique Information Disclosure
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External POC / Exploit Code
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