{"uuid": "8a03e072-0ce8-4693-bae1-928032006996", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "GHSA-v23m-ccfg-pq9h", "type": "seen", "source": "https://gist.github.com/alon710/df5b0744014030db937f68dddaa36b9f", "content": "# CVE-2026-55700: CVE-2026-55700: Path Traversal and Arbitrary File Write in pnpm stage download\n\n> **CVSS Score:** 7.1\n> **Published:** 2026-06-26\n> **Full Report:** https://cvereports.com/reports/CVE-2026-55700\n\n## Summary\nA path traversal vulnerability in pnpm stage download allows malicious registries or compromised package manifests to overwrite arbitrary files on the victim's filesystem via unvalidated package name and version fields.\n\n## TL;DR\nUnsanitized 'name' and 'version' fields in downloaded package manifests allow arbitrary filesystem writes during 'pnpm stage download' operations.\n\n## Exploit Status: POC\n\n## Technical Details\n\n- **CWE ID**: CWE-22\n- **Attack Vector**: Network\n- **CVSS**: 7.1\n- **EPSS**: 0.00258\n- **Impact**: High Integrity, Low Availability\n- **Exploit Status**: poc\n- **KEV Status**: Not Listed\n\n## Affected Systems\n\n- pnpm\n- **pnpm**: < 11.5.3 (Fixed in: `11.5.3`)\n\n## Mitigation\n\n- Upgrade pnpm to a patched version\n- Restrict staging commands to verified, trusted package registries\n- Implement system-level read/write restrictions on CI/CD environments\n\n**Remediation Steps:**\n1. Execute 'npm install -g pnpm@11.5.3' or use corepack to update pnpm.\n2. Audit any configured registry configurations to ensure they use secure HTTPS connections.\n3. Employ endpoint detection tools to flag suspicious file-write operations originating from Node.js applications.\n\n## References\n\n- [GitHub Pull Request #12303](https://github.com/pnpm/pnpm/pull/12303)\n- [GitHub Security Advisory GHSA-v23m-ccfg-pq9h](https://github.com/pnpm/pnpm/security/advisories/GHSA-v23m-ccfg-pq9h)\n- [CVE-2026-55700 Record](https://www.cve.org/CVERecord?id=CVE-2026-55700)\n\n\n---\n*Generated by [CVEReports](https://cvereports.com/reports/CVE-2026-55700) - Automated Vulnerability Intelligence*", "creation_timestamp": "2026-06-27T07:12:30.909503Z"}