Deno: Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)

Summary Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --deny-run, or --deny-ffi. On macOS, that comparison was done at the raw-byte level while the APFS filesystem treats different...

CVE-2025-61786 Deno's --deny-read check does not prevent permission bypass

Deno is a JavaScript, TypeScript, and WebAssembly runtime. In versions prior to 2.5.3 and 2.2.15, Deno.FsFile.prototype.stat and Deno.FsFile.prototype.statSync are not limited by the permission model check --deny-read=./. It's possible to retrieve stats from files that the user do not have explic...

CVE-2025-61786

CVE-2025-61786 affects the Deno runtime: prior to versions 2.5.3 and 2.2.15, Deno.FsFile.prototype.stat and Deno.FsFile.prototype.statSync bypass the permission check when --deny-read=./ is used, allowing retrieval of file stats from files the user does not have explicit read access to. The vulne...

GHSA-VG2R-RMGP-CGQJ Deno's --deny-write check does not prevent permission bypass

Summary Deno.FsFile.prototype.utime and Deno.FsFile.prototype.utimeSync are not limited by the permission model check --deny-write=./. It's possible to change to change the access atime and modification mtime times on the file stream resource even when the file is opened with read only permission...

Deno has --allow-read / --allow-write permission bypass in `node:sqlite`

Summary It is possible to bypass Deno's read/write permission checks by using ATTACH DATABASE statement. PoC js // poc.js import DatabaseSync from "node:sqlite" const db = new DatabaseSync":memory:"; db.exec"ATTACH DATABASE 'test.db' as test;"; db.exec"CREATE TABLE test.test id INTEGER PRIMARY KE...

CVE-2025-48935

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 2.2.0 and prior to versions 2.2.5, it is possible to bypass Deno's permission read/write db permission check by using ATTACH DATABASE statement. Version 2.2.5 contains a patch for the issue...

CVE-2025-48888

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 1.41.3 and prior to versions 2.1.13, 2.2.13, and 2.3.2, deno run --allow-read --deny-read main.ts results in allowed, even though 'deny' should be stronger. The result is the same with all global unary permissions give...

CVE-2025-48935

CVE-2025-48935 (Deno) affects Deno runtimes from 2.2.0 up to 2.2.4, where the read/write database permission check can be bypassed via the ATTACH DATABASE statement. The issue is resolved in version 2.2.5. Impact described in sources indicates a bypass of permission checks (read/write permission)...

CVE-2025-48935 Deno has --allow-read / --allow-write permission bypass in `node:sqlite`

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 2.2.0 and prior to versions 2.2.5, it is possible to bypass Deno's permission read/write db permission check by using ATTACH DATABASE statement. Version 2.2.5 contains a patch for the issue...

CVE-2025-48935 Deno has --allow-read / --allow-write permission bypass in `node:sqlite`

Deno is a JavaScript, TypeScript, and WebAssembly runtime. Starting in version 2.2.0 and prior to versions 2.2.5, it is possible to bypass Deno's permission read/write db permission check by using ATTACH DATABASE statement. Version 2.2.5 contains a patch for the issue...

CVE-2023-22499 Interactive permission prompt spoofing in Deno

Deno is a runtime for JavaScript and TypeScript that uses V8 and is built in Rust. Multi-threaded programs were able to spoof interactive permission prompt by rewriting the prompt to suggest that program is waiting on user confirmation to unrelated action. A malicious program could clear the...