pnpm 11.3.x < 11.5.3 Stage Download Path Traversal (CVE-2026-55700)

high Nessus Plugin ID 325221

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Synopsis

The pnpm package installed on the remote host is affected by a path traversal vulnerability.

Description

The version of pnpm installed on the remote host is 11.3.x prior to 11.5.3. It is, therefore, affected by a path traversal vulnerability:

- From 11.3.0 until 11.5.3, pnpm stage download derived a local filename from registry-controlled package name and version fields. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. (CVE-2026-55700)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to pnpm version 11.5.3 or later.

Plugin Details

Severity: High

ID: 325221

File Name: pnpm_stage_download_cve-2026-55700.nasl

Version: 1.2

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 7/6/2026

Updated: 7/7/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.98

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.7

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

CVSS Score Source: CVE-2026-55700

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.4

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

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

Vulnerability Information

CPE: cpe:/a:pnpm:pnpm

Required KB Items: Host/nodejs/modules/enumerated

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/25/2026

Vulnerability Publication Date: 6/25/2026

Reference Information

CVE: CVE-2026-55700

IAVA: 2026-A-0637

Detections

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