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CVE-2026-58494 Wasmtime: WASI hard links bypass wasmtime-wasi's FilePerms for destination

🗓️ 08 Jul 2026 20:22:16Reported by GoogleType 
osv
 osv🔗 osv.dev👁 2 Views

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 wi...

Related
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-58494
8 Jul 202620:22
–attackerkb
Circl		CVE-2026-58494
8 Jul 202622:25
–circl
CVE		CVE-2026-58494
8 Jul 202620:22
–cve
Cvelist		CVE-2026-58494 Wasmtime: WASI hard links bypass wasmtime-wasi's FilePerms for destination
8 Jul 202620:22
–cvelist
Debian CVE		CVE-2026-58494
8 Jul 202620:22
–debiancve
EUVD		EUVD-2026-42393
8 Jul 202620:22
–euvd
NVD		CVE-2026-58494
8 Jul 202621:16
–nvd
OSV		DEBIAN-CVE-2026-58494
8 Jul 202621:16
–osv
OSV		RUSTSEC-2026-0188 WASI hard links and renames bypass wasmtime-wasi's FilePerms for destination
24 Jun 202612:00
–osv
OSV		UBUNTU-CVE-2026-58494
9 Jul 202600:00
–osv
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SourceLink
githubwww.github.com/bytecodealliance/wasmtime/releases/tag/v24.0.11
githubwww.github.com/bytecodealliance/wasmtime/releases/tag/v36.0.12
githubwww.github.com/bytecodealliance/wasmtime/releases/tag/v45.0.3
githubwww.github.com/bytecodealliance/wasmtime/releases/tag/v46.0.1
githubwww.github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58494.json
githubwww.github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj
nvdwww.nvd.nist.gov/vuln/detail/CVE-2026-58494
githubwww.github.com/bytecodealliance/wasmtime/commit/5ddfd5f1ef28f2041fa07d237ad0336e167b0e0c
githubwww.github.com/bytecodealliance/wasmtime/commit/7db94cdcf0c79cb3dfde884b534b653f2dd83367
githubwww.github.com/bytecodealliance/wasmtime/commit/8a250aac0962ca1364b5f16525720e9d0b39edcd
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12 Jul 2026 03:54Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.16.5
EPSS0.00119
2