CVE-2026-100723

See a problem?
Please try reporting it to the source first.
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
Downstream
CLSA (3)
ECHO (1)
MINI (1)
Published
2026-09-27T01:28:30Z
Modified
2026-10-28T02:30:47Z
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
Fixed
4f2508abeb252aa86eb6761c78b3b000248fb089
Fixed
5214b02ef13b82497fcb917b45320dfd014ffd09
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "3.12.2"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StandardRange"
        },
        {
            "range": [
                {
                    "fixed": "4f2508abeb252aa86eb6761c78b3b000248fb089"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "range": [
                {
                    "fixed": "5214b02ef13b82497fcb917b45320dfd014ffd09"
                }
            ],
            "source": "REFERENCES_COMMIT"
        }
    ]
}

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
v3.9.0
v3.9.1
v3.9.2

Database specific

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