Detections
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Echo: vm2: security update to 3.12.2

medium Tenable Self-Hosted Container Security Plugin ID 473562

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2026-100723)

Solution

Update the vm2 library and its related packages to version 3.12.2 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-100723

Plugin Details

Severity: Medium

ID: 473562

Version: Revision 1.2

Type: Local

Published: 10/7/2026

Updated: 10/7/2026

Risk Information

VPR

Risk Factor: Low

Score: 3.9

Percentile: 52.45

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:P/A:N

CVSS Score Source: CVE-2026-100723

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 6.9

Threat Score: 2.5

Threat Vector: CVSS:4.0/E:U

Vector: 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

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 10/7/2026

Vulnerability Publication Date: 9/27/2026

Reference Information

CVE: CVE-2026-100723