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security: reject PATH_TO_CLAUDE_CODE_EXECUTABLE with control characters #1185

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Merged
ashwin-ant merged 1 commit into from
Apr 6, 2026
+5 −0
Merged

security: reject PATH_TO_CLAUDE_CODE_EXECUTABLE with control characters #1185

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5 changes: 5 additions & 0 deletions src/entrypoints/run.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,11 @@ import type { ClaudeRunResult } from "../../base-action/src/run-claude-sdk";
async function installClaudeCode(): Promise<void> {
const customExecutable = process.env.PATH_TO_CLAUDE_CODE_EXECUTABLE;
if (customExecutable) {
if (/[\x00-\x1f\x7f]/.test(customExecutable)) {
throw new Error(
"PATH_TO_CLAUDE_CODE_EXECUTABLE contains control characters (e.g. newlines), which is not allowed",
);
}
console.log(`Using custom Claude Code executable: ${customExecutable}`);
const claudeDir = dirname(customExecutable);
// Add to PATH by appending to GITHUB_PATH
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