CVE-2026-47092: Claude HUD 0.0.12 Arbitrary Command Execution via COMSPEC Environment Variable

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-18 · updated 2026-10-26
Weakness: CWE-427

Description

Claude HUD through 0.0.12, patched in commit 234d9aa, contains a command injection vulnerability that allows local attackers to execute arbitrary commands by manipulating the COMSPEC environment variable. Attackers can set COMSPEC to an arbitrary binary path before claude-hud performs its version check, causing execFile() to execute the attacker-supplied executable with cmd.exe arguments, resulting in arbitrary code execution on Windows systems.

Affected products

jarrodwatts claude-hud: through 0.0.12

References

https://github.com/jarrodwatts/claude-hud/commit/234d9aad919b51326a43bcf90b45ae35c23afc30
https://github.com/jarrodwatts/claude-hud/issues/485
https://github.com/jarrodwatts/claude-hud/pull/487
https://www.vulncheck.com/advisories/claude-hud-arbitrary-command-execution-via-comspec-environment-variable

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