CVE-2026-119132

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    CVE-2026-119132

    Published: 29 Oct 2026Last Modified: 5 Nov 2026

    Summary: Wasmtime 49.0.0 before 49.0.3 Host Panic via Overlapping String Transcode in Fused Adapter

    Details: Wasmtime from 49.0.0 before 49.0.3 contains a denial-of-service vulnerability that allows a WebAssembly guest to trigger a host panic by transcoding overlapping strings in fused adapters. Attackers can make a same-instance component-to-component call transferring a string whose source and destination alias each other, crashing the host instead of raising a trap.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119132.json, https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-54p9-vhhq-8f7q, https://nvd.nist.gov/vuln/detail/CVE-2026-119132, https://www.vulncheck.com/advisories/wasmtime-49.0.0-before-49.0.3-host-panic-via-overlapping-string-transcode-in-fused-adapter

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 17830bd3c0331d920a8aa38846eebc4d46d98c23
    Fixed -f96eabaa11a06086e4fb779ed1c1688481067ab9

    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
    CVE-2026-119132 | CVE-DB