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Description

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.

PUBLISHED Reserved 2026-06-30 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M




MEDIUM: 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Problem types

CWE-281: Improper Preservation of Permissions

CWE-863: Incorrect Authorization

Product status

< 24.0.11
affected

>= 25.0.0, < 36.0.12
affected

>= 37.0.0, < 45.0.3
affected

>= 46.0.0, < 46.0.1
affected

References

github.com/...smtime/security/advisories/GHSA-4ch3-9j33-3pmj

github.com/...ommit/5ddfd5f1ef28f2041fa07d237ad0336e167b0e0c

github.com/...ommit/7db94cdcf0c79cb3dfde884b534b653f2dd83367

github.com/...ommit/8a250aac0962ca1364b5f16525720e9d0b39edcd

github.com/...ommit/d3ceb56ec35f39e02496eeb4e2d9c7f4fb964d9e

github.com/bytecodealliance/wasmtime/releases/tag/v24.0.11

github.com/bytecodealliance/wasmtime/releases/tag/v36.0.12

github.com/bytecodealliance/wasmtime/releases/tag/v45.0.3

github.com/bytecodealliance/wasmtime/releases/tag/v46.0.1

cve.org (CVE-2026-58494)

nvd.nist.gov (CVE-2026-58494)

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