{"id":"CVE-2026-58494","state":"PUBLISHED","title":"Wasmtime: WASI hard links bypass wasmtime-wasi's FilePerms for destination","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.","publishedAt":"2026-07-08T20:22:16.039Z","updatedAt":"2026-07-09T13:28:57.055Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["bytecodealliance wasmtime"],"affected":[{"vendor":"bytecodealliance","product":"wasmtime","versions":[{"version":"< 24.0.11","status":"affected"},{"version":">= 25.0.0, < 36.0.12","status":"affected"},{"version":">= 37.0.0, < 45.0.3","status":"affected"},{"version":">= 46.0.0, < 46.0.1","status":"affected"}]}],"references":["https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj","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","https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.12","https://github.com/bytecodealliance/wasmtime/releases/tag/v45.0.3","https://github.com/bytecodealliance/wasmtime/releases/tag/v46.0.1"],"weaknesses":["CWE-281","CWE-863"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/58xxx/CVE-2026-58494.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-58494","state":"PUBLISHED","datePublished":"2026-07-08T20:22:16.039Z","dateUpdated":"2026-07-09T13:28:57.055Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-30T20:21:25.812Z"},"containers":{"cna":{"title":"Wasmtime: WASI hard links bypass wasmtime-wasi's FilePerms for destination","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"bytecodealliance","product":"wasmtime","versions":[{"version":"< 24.0.11","status":"affected"},{"version":">= 25.0.0, < 36.0.12","status":"affected"},{"version":">= 37.0.0, < 45.0.3","status":"affected"},{"version":">= 46.0.0, < 46.0.1","status":"affected"}]}],"references":[{"url":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj","name":"https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/bytecodealliance/wasmtime/commit/5ddfd5f1ef28f2041fa07d237ad0336e167b0e0c","name":"https://github.com/bytecodealliance/wasmtime/commit/5ddfd5f1ef28f2041fa07d237ad0336e167b0e0c","tags":["x_refsource_MISC"]},{"url":"https://github.com/bytecodealliance/wasmtime/commit/7db94cdcf0c79cb3dfde884b534b653f2dd83367","name":"https://github.com/bytecodealliance/wasmtime/commit/7db94cdcf0c79cb3dfde884b534b653f2dd83367","tags":["x_refsource_MISC"]},{"url":"https://github.com/bytecodealliance/wasmtime/commit/8a250aac0962ca1364b5f16525720e9d0b39edcd","name":"https://github.com/bytecodealliance/wasmtime/commit/8a250aac0962ca1364b5f16525720e9d0b39edcd","tags":["x_refsource_MISC"]},{"url":"https://github.com/bytecodealliance/wasmtime/commit/d3ceb56ec35f39e02496eeb4e2d9c7f4fb964d9e","name":"https://github.com/bytecodealliance/wasmtime/commit/d3ceb56ec35f39e02496eeb4e2d9c7f4fb964d9e","tags":["x_refsource_MISC"]},{"url":"https://github.com/bytecodealliance/wasmtime/releases/tag/v24.0.11","name":"https://github.com/bytecodealliance/wasmtime/releases/tag/v24.0.11","tags":["x_refsource_MISC"]},{"url":"https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.12","name":"https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.12","tags":["x_refsource_MISC"]},{"url":"https://github.com/bytecodealliance/wasmtime/releases/tag/v45.0.3","name":"https://github.com/bytecodealliance/wasmtime/releases/tag/v45.0.3","tags":["x_refsource_MISC"]},{"url":"https://github.com/bytecodealliance/wasmtime/releases/tag/v46.0.1","name":"https://github.com/bytecodealliance/wasmtime/releases/tag/v46.0.1","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-281","lang":"en","description":"CWE-281: Improper Preservation of Permissions","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-863","lang":"en","description":"CWE-863: Incorrect Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-08T20:22:16.039Z"},"source":{"advisory":"GHSA-4ch3-9j33-3pmj","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-09T13:28:46.718754Z","id":"CVE-2026-58494","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-09T13:28:57.055Z"}}]}}}