high8.1
CVE-2026-49402
Deno is a JavaScript, TypeScript, and WebAssembly runtime.
Impact
Deno is a JavaScript, TypeScript, and WebAssembly runtime. Prior to 2.7.10, Deno's node:child_process implementation provided an escapeShellArg() helper used when callers passed shell: true to spawn / spawnSync / exec and friends. On Windows, the helper failed to quote arguments that contained cmd.exe metacharacters and did not neutralize % (which cmd.exe expands even inside double-quoted strings). An attacker who controlled any portion of an argument passed to such a call could inject arbitrary additional commands into the spawned cmd.exe invocation. This vulnerability is fixed in 2.7.10.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rust | deno | < 2.7.10 | 2.7.10 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Deno | Deno | before 2.7.10 |