CVE-2026-47261 Wasmtime: WASI path_open(TRUNCATE) bypasses `FilePerms::WRITE` host restriction

Wasmtime is a runtime for WebAssembly. In versions prior to 24.0.9, 36.0.10, and 44.0.2, when a filesystem preopen is given DirPerms::all and FilePerms::READ without FilePerms::WRITE, this access control mechanism can be bypassed via the wasip2 descriptor.open-at or wasip1 pathopen interfaces by...

CVE-2026-47261

CVE-2026-47261 : Wasmtime-wasi WASI path_open(TRUNCATE) bypasses FilePerms::WRITE host restriction. Root cause: when OpenFlags::TRUNCATE is used, open_mode was not OR-ed with WRITE, allowing a READ-only preopen with DirPerms::all() to bypass access checks via wasip1 path_open or wasip2 descriptor...

CVE-2026-47261

Wasmtime is a runtime for WebAssembly. In versions prior to 24.0.9, 36.0.10, and 44.0.2, when a filesystem preopen is given DirPerms::all and FilePerms::READ without FilePerms::WRITE, this access control mechanism can be bypassed via the wasip2 descriptor.open-at or wasip1 pathopen interfaces by...

CVE-2026-47261

Wasmtime is a runtime for WebAssembly. In versions prior to 24.0.9, 36.0.10, and 44.0.2, when a filesystem preopen is given DirPerms::all and FilePerms::READ without FilePerms::WRITE, this access control mechanism can be bypassed via the wasip2 descriptor.open-at or wasip1 pathopen interfaces by...

RUSTSEC-2026-0182 Leak in WASIp1 `fd_renumber` implementation

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-3p27-qvp9-27qf For more information see the GitHub-hosted security advisory...

Leak in WASIp1 `fd_renumber` implementation

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-3p27-qvp9-27qf For more information see the GitHub-hosted security advisory...

CVE-2026-47261: Improper Access Control

Wasmtime is a runtime for WebAssembly. In versions prior to 24.0.9, 36.0.10, and 44.0.2, when a filesystem preopen is given DirPerms::all and FilePerms::READ without FilePerms::WRITE, this access control mechanism can be bypassed via the wasip2 descriptor.open-at or wasip1 pathopen interfaces by...

PT-2026-54848

Name of the Vulnerable Software and Affected Versions Wasmtime versions prior to 24.0.10 Wasmtime versions 25.0.0 through 36.0.10 Wasmtime versions 37.0.0 through 44.0.2 Wasmtime versions 45.0.0 through 45.1 Description A resource leak exists in the native implementation of WASIp1 within the fd...

FreeBSD : tree-sitter-cli -- Always-Incorrect Control Flow Implementation in wasmtime crate (36ec75da-633d-11f1-9dbc-28d2443e6cfa)

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 36ec75da-633d-11f1-9dbc-28d2443e6cfa advisory. https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-q49f-xg75-m9xw reports: Wasmtime ...

wasmtime-wasi: WASI path_open(TRUNCATE) bypasses `FilePerms::WRITE` host restriction

Summary In wasmtime-wasi, when a filesystem preopen is given DirPerms::all and FilePerms::READ without FilePerms::WRITE, this wasmtime-wasi enforced access control mechanism can be bypassed by using the wasip2 descriptor.open-at or wasip1 pathopen interfaces by opening a file with...

GHSA-2R75-CXRJ-CMPH wasmtime-wasi: WASI path_open(TRUNCATE) bypasses `FilePerms::WRITE` host restriction

Summary In wasmtime-wasi, when a filesystem preopen is given DirPerms::all and FilePerms::READ without FilePerms::WRITE, this wasmtime-wasi enforced access control mechanism can be bypassed by using the wasip2 descriptor.open-at or wasip1 pathopen interfaces by opening a file with...

SUSE-SU-2026:22002-1 Security update for tree-sitter

This update for tree-sitter fixes the following issue - CVE-2026-44216: wasmtime: allocation of a table exceeding the size of the host's address space leads to panic bsc1265300...

OPENSUSE-SU-2026:20863-1 Security update for tree-sitter

This update for tree-sitter fixes the following issue - CVE-2026-44216: wasmtime: allocation of a table exceeding the size of the host's address space leads to panic bsc1265300...

Malicious code in pgrayy-wasmtime (PyPI)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector e7c9cfd90d6de2acd86d50019dfa4a2b140ac9246fdcbae8d7aaa3d17bd4af6e The distribution is published as pgrayy-wasmtime but its toplevel.txt declares the top-level import name as wasmtime, and the entire Python source tr...

MAL-2026-4762 Malicious code in pgrayy-wasmtime (PyPI)

--- -= Per source details. Do not edit below this line.=- Source: amazon-inspector e7c9cfd90d6de2acd86d50019dfa4a2b140ac9246fdcbae8d7aaa3d17bd4af6e The distribution is published as pgrayy-wasmtime but its toplevel.txt declares the top-level import name as wasmtime, and the entire Python source tr...

RUSTSEC-2026-0149 WASI path_open(TRUNCATE) bypasses `FilePerms::WRITE` host restriction

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-2r75-cxrj-cmph For more information see the GitHub-hosted security advisory...

WASI path_open(TRUNCATE) bypasses `FilePerms::WRITE` host restriction

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-2r75-cxrj-cmph For more information see the GitHub-hosted security advisory...

PT-2026-42815

Name of the Vulnerable Software and Affected Versions wasmtime-wasi affected versions not specified Description An access control mechanism bypass exists when a filesystem preopen is configured with DirPerms::all and FilePerms::READ without FilePerms::WRITE. This allows bypassing restrictions by...

CVE-2026-44216

A flaw was found in Wasmtime, a runtime for WebAssembly. A remote attacker could exploit an arithmetic overflow vulnerability by instantiating a WebAssembly module or component that attempts to allocate an extremely large table using the WebAssembly memory64 proposal. This flaw causes Wasmtime to...

SUSE CVE-2026-44216

Wasmtime is a runtime for WebAssembly. From 30.0.0 to 36.0.8, 43.0.2, and 44.0.1, Wasmtime's allocation logic for a WebAssembly table contained checked arithmetic which panicked on overflow. This overflow is possible to trigger, and thus panic, when a table with an extremely large size is...