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...

PT-2026-50145

Name of the Vulnerable Software and Affected Versions Deno versions prior to 2.7.14 Description Deno's permission system on macOS enforces filesystem and execution restrictions by comparing requested paths against those supplied to --deny-read, --deny-write, --deny-run, or --deny-ffi. The...

JLSEC-2026-112 Deno's --deny-read check does not prevent permission bypass

Summary 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 explicit read access to the script is executed with --deny-read=./ Similar APIs like Deno.stat a...

JLSEC-2026-109 Deno run with --allow-read and --deny-read flags results in allowed

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-2025-61786

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...

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

Summary 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 explicit read access to the script is executed with --deny-read=./ Similar APIs like Deno.stat a...

GHSA-QQ26-84MH-26J9 Deno's --deny-read check does not prevent permission bypass

Summary 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 explicit read access to the script is executed with --deny-read=./ Similar APIs like Deno.stat a...

CVE-2025-61786

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 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 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

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 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...

EUVD-2025-33180

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...

PT-2025-41209

Name of the Vulnerable Software and Affected Versions Deno versions prior to 2.5.3 Deno versions prior to 2.2.15 Description Deno is a JavaScript, TypeScript, and WebAssembly runtime. The Deno.FsFile.prototype.stat and Deno.FsFile.prototype.statSync functions do not enforce the --deny-read=./...

EUVD-2024-20950

Malicious code in bioql PyPI...

SUSE 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...

GHSA-XQXC-X6P3-W683 Deno run with --allow-read and --deny-read flags results in allowed

Summary deno run --allow-read --deny-read main.ts results in allowed, even though 'deny' should be stronger. Same with all global unary permissions given as --allow- --deny-. Details Caused by the fast exit logic in 22894. PoC Run the above command expecting no permissions to be passed. Impact Th...

Deno run with --allow-read and --deny-read flags results in allowed

Summary deno run --allow-read --deny-read main.ts results in allowed, even though 'deny' should be stronger. Same with all global unary permissions given as --allow- --deny-. Details Caused by the fast exit logic in 22894. PoC Run the above command expecting no permissions to be passed. Impact Th...

Deno 安全漏洞

Deno is a simple, modern and secure JavaScript and TypeScript runtime environment from Deno Open Source. A security vulnerability exists in Deno versions prior to 2.1.13, prior to 2.2.13, and prior to 2.3.2, which stems from the deny-read permission not being in effect correctly, which could lead...