CVE-2026-119136

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    CVE-2026-119136

    Published: 29 Oct 2026Last Modified: 5 Nov 2026

    Summary: Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 Async-Entrypoint Enforcement Bypass

    Details: Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains insufficient checks in Store when mixing async-style and sync-style WebAssembly calls. Embedders re-entering WebAssembly via sync APIs from host functions called asynchronously can trigger runtime panics or unsound cross-thread movement of !Send host variables.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119136.json, https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vcg5-q8m5-8379, https://nvd.nist.gov/vuln/detail/CVE-2026-119136, https://www.vulncheck.com/advisories/wasmtime-42.0.0-before-48.0.6-and-49.0.0-before-49.0.3-async-entrypoint-enforcement-bypass

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- aa3cfe72f25f7a06f93af3f5d15a615e34628b97
    Fixed -72bc45bd197c46718df0c02b8d4cbc1cb610ab2d

    Affected versions

    v49.0.2
    v49.0.1
    v49.0.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High