CVE-2026-115389

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Source
https://cve.org/CVERecord?id=CVE-2026-115389
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115389.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-115389
Aliases
Downstream
Published
2026-10-22T19:13:55Z
Modified
2026-10-31T02:30:38Z
Severity
  • 1.0 (Low) CVSS_V4 - CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator
Summary
Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 Denial of Service via Val API
Details

Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and 49.0.0 before 49.0.1 does not adequately account for host allocations when lifting guest values through the dynamically-typed Val API, bypassing the hostcall fuel limit. A malicious WebAssembly guest can return crafted values that allocate at least ~100x more host memory than tracked, causing denial of service.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115389.json"
}
References

Affected packages

Git / github.com/bytecodealliance/wasmtime

Affected ranges

Type
GIT
Repo
https://github.com/bytecodealliance/wasmtime
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
5cd4bf51aad8ae193823d35a05bfa97dd8dc3f11
Introduced
7b3d6ae79e9153a2477668062f5622c10333925f
Fixed
ebf20ab7cbf35fa3fbd8202562017fda6a541021
Introduced
17830bd3c0331d920a8aa38846eebc4d46d98c23
Fixed
46c23a87dac1465986a8ad53ba6a7ae49372857b
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "36.0.16"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "37.0.0"
                },
                {
                    "fixed": "48.0.3"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "49.0.0"
                },
                {
                    "fixed": "49.0.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Affected versions

cranelift-v0.*
cranelift-v0.60.0
cranelift-v0.61.0
cranelift-v0.69.0
Other
dev
v0.*
v0.12.0
v0.16.0
v0.17.0
v0.18.0
v0.19.0
v0.20.0
v0.21.0
v0.22.0
v0.23.0
v0.24.0
v0.25.0
v0.26.0
v0.27.0
v0.28.0
v0.29.0
v0.30.0
v0.31.0
v0.32.0
v0.33.0
v0.34.0
v0.35.0
v36.*
v36.0.0
v36.0.1
v36.0.10
v36.0.11
v36.0.12
v36.0.13
v36.0.14
v36.0.15
v36.0.2
v36.0.3
v36.0.4
v36.0.5
v36.0.6
v36.0.7
v36.0.8
v36.0.9
v48.*
v48.0.0
v48.0.1
v48.0.2
v49.*
v49.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115389.json"