CVE-2026-126407

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Source
https://cve.org/CVERecord?id=CVE-2026-126407
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126407.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-126407
Aliases
Downstream
Published
2026-11-13T09:35:43Z
Modified
2026-11-15T02:31:09Z
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 before 36.0.20 Denial of Service via Borrowed Resource Transfer
Details

Wasmtime before 36.0.20, 37.0.0 before 48.0.8, 49.0.0 before 49.0.5, and 50.0.0 before 50.0.1 allocates untracked host memory when a component receives a borrow of a resource it defines itself, bypassing the per-store handle limit. A malicious guest component can repeatedly transfer such borrowed resources to consume arbitrary host memory, causing denial of service.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126407.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
b265f78b1e92e12240ec7bdc21c7a559d2df968e
Introduced
7b3d6ae79e9153a2477668062f5622c10333925f
Fixed
7b6c29ec3e9a49c97da231665cbd8eead9ccbda0
Introduced
17830bd3c0331d920a8aa38846eebc4d46d98c23
Fixed
805a0f15320e8836cf2b9f001b53d884bf866c89
Introduced
ebe5e8df1f4e12c5fc2f5954926881d8d61367d8
Fixed
c307ec81de02852d815e9849f7c89d955c03c30d
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "36.0.20"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "37.0.0"
                },
                {
                    "fixed": "48.0.8"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "49.0.0"
                },
                {
                    "fixed": "49.0.5"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "introduced": "50.0.0"
                },
                {
                    "fixed": "50.0.1"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        }
    ]
}

Affected versions

cranelift-v0.*
cranelift-v0.60.0
cranelift-v0.61.0
cranelift-v0.69.0
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
v36.0.16
v36.0.17
v36.0.18
v36.0.19
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
v48.0.3
v48.0.4
v48.0.5
v48.0.6
v48.0.7
v49.*
v49.0.0
v49.0.1
v49.0.2
v49.0.3
v49.0.4
v50.*
v50.0.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-126407.json"