CVE-2026-115893

{"id": "CVE-2026-115893", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-115893", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-10-29T18:19:46.559873Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 9.9, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 6.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "bytecodealliance", "product": "wasmtime", "versions": [{"status": "affected", "version": "< 36.0.19"}, {"status": "affected", "version": ">= 37.0.0, < 48.0.7"}, {"status": "affected", "version": ">= 49.0.0, < 49.0.4"}]}]}], "published": "2026-10-23T22:16:58.820", "references": [{"url": "https://github.com/bytecodealliance/wasmtime/commit/222ff3a65dab9aa7011f8c246937751a0bac5abd", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/commit/994549891c8a706cb4f2809f9d17b9f67b31e618", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/commit/e61df1b454be9313d61a5f8de07722a421139bbe", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/commit/f517bd6e890c7c1291ab9fe05d8cc0c9f11e56aa", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/pull/14818", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/pull/14819", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/pull/14820", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/pull/14826", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.19", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v48.0.7", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/releases/tag/v49.0.4", "source": "security-advisories@github.com"}, {"url": "https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-mghf-wjfp-p5xm", "source": "security-advisories@github.com"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-691"}]}], "descriptions": [{"lang": "en", "value": "Wasmtime is a runtime for WebAssembly. Prior to 36.0.19, 48.0.7, and 49.0.4, the Cranelift compiler backend on aarch64 can compile a Wasm br_table instruction with more than approximately 256,000 targets so that it has an incorrect conditional branch target. The branch can then jump to arbitrary other code at a user-controlled offset, allowing a user-controlled Wasm module to escape the sandbox on aarch64 engines using the default Cranelift backend. This issue is fixed in versions 36.0.19, 48.0.7, and 49.0.4."}], "lastModified": "2026-10-29T19:17:17.093", "sourceIdentifier": "security-advisories@github.com"}