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CVE-2026-58494
Wasmtime: WASI hard links bypass wasmtime-wasi's FilePerms for destination
Medium6.5EPSS 0.17%
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | Medium6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N |
| NVDNVD · Deferred | 3.1 | Medium6.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N |
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.
Weakness
Affected products
- affected < 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 packages
From reviewed advisories of the GitHub Advisory Database.
- crates.iowasmtime-wasiGHSA-4ch3-9j33-3pmj (opens in a new tab)
References (9)
- https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj (opens in a new tab)x_refsource_CONFIRM
- https://github.com/bytecodealliance/wasmtime/commit/5ddfd5f1ef28f2041fa07d237ad0336e167b0e0c (opens in a new tab)x_refsource_MISC
- https://github.com/bytecodealliance/wasmtime/commit/7db94cdcf0c79cb3dfde884b534b653f2dd83367 (opens in a new tab)x_refsource_MISC
- https://github.com/bytecodealliance/wasmtime/commit/8a250aac0962ca1364b5f16525720e9d0b39edcd (opens in a new tab)x_refsource_MISC
- https://github.com/bytecodealliance/wasmtime/commit/d3ceb56ec35f39e02496eeb4e2d9c7f4fb964d9e (opens in a new tab)x_refsource_MISC
- https://github.com/bytecodealliance/wasmtime/releases/tag/v24.0.11 (opens in a new tab)x_refsource_MISC
- https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.12 (opens in a new tab)x_refsource_MISC
- https://github.com/bytecodealliance/wasmtime/releases/tag/v45.0.3 (opens in a new tab)x_refsource_MISC
- https://github.com/bytecodealliance/wasmtime/releases/tag/v46.0.1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-4ch3-9j33-3pmj (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-58494)Record last updated .