CVE-2026-100723

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Source
https://cve.org/CVERecord?id=CVE-2026-100723
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100723.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-100723
Aliases
  • GHSA-489w-w794-jq94
Published
2026-09-27T01:28:30Z
Modified
2026-09-28T03:48:31Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N CVSS Calculator
Summary
vm2 before 3.12.2 Memory Disclosure via zlib Buffer Pool
Details

vm2 before 3.12.2 does not apply its Buffer backing-store ownership invariant (byteOffset === 0 and buffer.byteLength === length) to Buffers returned from host builtin modules. When an application explicitly exposes Node's zlib module through NodeVM's builtin allowlist (require: { builtin: ['zlib'] }), zlib.deflateSync can return a Buffer backed by Node's shared small-buffer pool whose .buffer is the entire pool. Untrusted guest code can construct a full-width view of that ArrayBuffer (Buffer.from(result.buffer, 0, result.buffer.byteLength)) to read and modify bytes belonging to unrelated host buffers, disclosing and corrupting host-realm memory across the sandbox boundary.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-200"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100723.json"
}
References

Affected packages

Git / github.com/patriksimek/vm2

Affected ranges

Type
GIT
Repo
https://github.com/patriksimek/vm2
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a0139cf6a7ad72a685420f53479a99fe385cf394
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "3.12.2"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

3.*
3.11.6
3.9.10
3.9.11
3.9.12
3.9.13
3.9.14
3.9.15
3.9.16
3.9.17
3.9.18
3.9.19
3.9.3
3.9.4
3.9.5
3.9.6
3.9.7
3.9.8
3.9.9
v3.*
v3.10.0
v3.10.1
v3.10.2
v3.10.3
v3.10.4
v3.10.5
v3.11.0
v3.11.1
v3.11.2
v3.11.3
v3.11.4
v3.11.5
v3.11.7
v3.11.8
v3.12.0
v3.12.1
v3.9.0
v3.9.1
v3.9.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100723.json"