CVE-2026-44216

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Source
https://cve.org/CVERecord?id=CVE-2026-44216
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44216.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-44216
Aliases
Downstream
Related
Published
2026-05-14T14:54:32.975Z
Modified
2026-07-16T03:31:08.613951485Z
Severity
  • 5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Wasmtime: Panic when allocating a table exceeding the size of the host's address space
Details

Wasmtime is a runtime for WebAssembly. From 30.0.0 to 36.0.8, 43.0.2, and 44.0.1, Wasmtime's allocation logic for a WebAssembly table contained checked arithmetic which panicked on overflow. This overflow is possible to trigger, and thus panic, when a table with an extremely large size is allocated. This is possible with the WebAssembly memory64 proposal where tables can have sizes in the 64-bit range as opposed to the previous 32-bit range which would not overflow. The panic happens when attempting to create a very large table, such as when instantiating a WebAssembly module or component. This vulnerability is fixed in 36.0.8, 43.0.2, and 44.0.1.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44216.json",
    "cwe_ids": [
        "CWE-770"
    ],
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/bytecodealliance/wasmtime

Affected ranges

Type
GIT
Repo
https://github.com/bytecodealliance/wasmtime
Events
Introduced
ede663c2ac43dad89877844440e53e0214468f03
Fixed
332e8ad2374e78adba1127f725d6603a4a5f96f3
Introduced
7b3d6ae79e9153a2477668062f5622c10333925f
Fixed
f8557c1ad85b8fc123b715d15db7b52483eade96
Introduced
af382d7d946b3de82db4bb1f6065b565f97446ae
Last affected
af382d7d946b3de82db4bb1f6065b565f97446ae
Database specific 
{
    "cpe": [
        "cpe:2.3:a:bytecodealliance:wasmtime:*:*:*:*:*:rust:*:*",
        "cpe:2.3:a:bytecodealliance:wasmtime:44.0.0:*:*:*:*:rust:*:*"
    ],
    "source": [
        "CPE_RANGE",
        "CPE_STRING"
    ],
    "extracted_events": [
        {
            "introduced": "30.0.0"
        },
        {
            "fixed": "36.0.8"
        },
        {
            "introduced": "37.0.0"
        },
        {
            "fixed": "43.0.2"
        },
        {
            "introduced": "44.0.0"
        },
        {
            "last_affected": "44.0.0"
        }
    ]
}

Affected versions

44.*
44.0.0
v44.*
v44.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-44216.json"