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    CVE-2026-119134

    Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 caps component-model resource handle tables only per component instance and does not charge handle allocations to any ResourceLimiter or StoreLimits. A malicious guest can repeatedly call resource.new and instantiate sub-components to exceed the per-instance cap many times over, causing unbounded host memory growth.

    Published:Oct 29, 2026
    Last Modified:Oct 29, 2026
    EPS:Oct 29, 2026
    EPSS Score:
    CVSS Score:6.2

    Affected Products

    Vendor
    Bytecodealliance
    Product
    Wasmtime

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-119139 (CVSS 5.9) — Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a leftover assertion in component::Func::call …
    CVE-2026-119138 (CVSS 5.9) — Wasmtime 46.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a denial of service vulnerability that allows …
    CVE-2026-119137 (CVSS 6.9) — Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains a stack overflow vulnerability that allows gue…

    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