CVE-2026-58494
Wasmtime is a runtime for WebAssembly. Prior to 24.0.11, 36.0.12, 45.0.3, and 46.0.1, wasmtime-wasi hard-link creation and renaming check directory permissions but not matching FilePerms on source and destination preopens, allowing a WASI guest with a read-only source file capability to overwrite host files exposed as FilePerms::READ through wasip1, wasip2, or wasip3 filesystem interfaces. This issue is fixed in versions 24.0.11, 36.0.12, 45.0.3, and 46.0.1.
- CVSS 3.1
- 6.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-281, CWE-863
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-4ch3-9j33-3pmj | crates.io | wasmtime-wasi | <24.0.11 | 24.0.11 |
| GHSA-4ch3-9j33-3pmj | crates.io | wasmtime-wasi | >=25.0.0 <36.0.12 | 36.0.12 |
| GHSA-4ch3-9j33-3pmj | crates.io | wasmtime-wasi | >=37.0.0 <45.0.3 | 45.0.3 |
| GHSA-4ch3-9j33-3pmj | crates.io | wasmtime-wasi | >=46.0.0 <46.0.1 | 46.0.1 |
| RUSTSEC-2026-0188 | crates.io | wasmtime-wasi | >=0.0.0-0 <24.0.11 >=25.0.0 <36.0.12 >=37.0.0 <45.0.3 >=46.0.0 <46.0.1 | 24.0.11, 36.0.12, 45.0.3, 46.0.1 |
References
- https://github.com/bytecodealliance/wasmtime/commit/5ddfd5f1ef28f2041fa07d237ad0336e167b0e0c
- https://github.com/bytecodealliance/wasmtime/commit/7db94cdcf0c79cb3dfde884b534b653f2dd83367
- https://github.com/bytecodealliance/wasmtime/commit/8a250aac0962ca1364b5f16525720e9d0b39edcd
- https://github.com/bytecodealliance/wasmtime/commit/d3ceb56ec35f39e02496eeb4e2d9c7f4fb964d9e
- https://github.com/bytecodealliance/wasmtime/releases/tag/v24.0.11