CVE-2026-54786

Wasmtime’s native WASIp1 fd_renumber implementation leaks host resources because the guest-facing fd_renumber updates only the WASIp1 descriptor table, not the host’s underlying table. This affects wasm runtimes that expose fd_renumber and allow file descriptors; affected versions include all pri...

CVE-2026-54786

Wasmtime is a runtime for WebAssembly. All versions prior to 24.0.10; versions 25.0.0 through those before 36.0.11; versions 37.0.0 through those before 44.0.3; and versions 45.0.0 and 45.0.1 contain a native implementation of WASIp1 which suffers from a leak in the fdrenumber function where the...

CVE-2026-54786

Wasmtime is a runtime for WebAssembly. All versions prior to 24.0.10; versions 25.0.0 through those before 36.0.11; versions 37.0.0 through those before 44.0.3; and versions 45.0.0 and 45.0.1 contain a native implementation of WASIp1 which suffers from a leak in the fdrenumber function where the...

CVE-2026-54786

Wasmtime is a runtime for WebAssembly. All versions prior to 24.0.10; versions 25.0.0 through those before 36.0.11; versions 37.0.0 through those before 44.0.3; and versions 45.0.0 and 45.0.1 contain a native implementation of WASIp1 which suffers from a leak in the fdrenumber function where the...

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...

WASI hard links and renames bypass wasmtime-wasi's FilePerms for destination

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj For more information see the GitHub-hosted security advisory...

RUSTSEC-2026-0188 WASI hard links and renames bypass wasmtime-wasi's FilePerms for destination

This is an entry in the RustSec database for the Wasmtime security advisory located at https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj For more information see the GitHub-hosted security advisory...

Linux Distros Unpatched Vulnerability : CVE-2026-47261

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

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...

DEBIAN-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...

UBUNTU-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: 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

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: 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...

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...

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 ...

auto-wasi (=0.1.0), deterministic-wasi-ctx (>=0.1.1 <=0.1.14) +53 more potentially affected by CVE-2026-47261 via wasmtime-wasi (>=0.10.0 <=1.0.2)

wasmtime-wasi CARGO version =0.10.0, =0.1.1, =0.5.3-0, =0.4.0, =0.4.0, =0.5.0, =0.0.1-alpha, =0.1.0, =0.1.0, =0.1.0, =0.9.0, =0.9.0, =0.9.0, =0.7.0, =0.9.2 and more Source cves: CVE-2026-47261 Source advisory: OSV:GHSA-2R75-CXRJ-CMPH...