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CVE-2026-101044

pacquet before 12.0.0-alpha.5 Path Traversal via lockfile alias

CVSS 4.0 7.1 HIGHCVSS 3.1 7.1 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-101044

Published

pacquet, the Rust package-manager component shipped in the pnpm npm package versions >=12.0.0-alpha.0 and <12.0.0-alpha.5, does not validate dependency alias/name paths taken from a lockfile before using them in install-time filesystem joins. When a user installs a project with an attacker-supplied lockfile using --trust-lockfile or a frozen lockfile, alias entries containing path traversal segments (for example '../../escaped-link') are used when creating dependency and package links, bin destinations, hoisted entries, and virtual-store slots, allowing symlinks and directories to be created outside the intended project and node_modules boundary. Version 12.0.0-alpha.5 validates dependency names and every virtual-store slot path with a shared safe-join containment helper before any filesystem materialization, rejecting traversal, absolute, platform-specific, and reserved names with ERR_PNPM_INVALID_DEPENDENCY_NAME.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-101044

Published

pnpm

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "pnpm",
                    "product": "pnpm",
                    "defaultStatus": "unaffected",
                    "packageURL": "pkg:npm/pnpm",
                    "versions": [
                        {
                            "version": "12.0.0-alpha.0",
                            "status": "affected",
                            "versionType": "semver",
                            "lessThan": "12.0.0-alpha.5"
                        },
                        {
                            "version": "12.0.0-alpha.5",
                            "status": "unaffected",
                            "versionType": "semver"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON