High severity7.1NVD Advisory· Published Jun 25, 2026· Updated Jun 29, 2026
CVE-2026-55700
CVE-2026-55700
Description
pnpm is a package manager. 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. This vulnerability is fixed in 11.5.3.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
pnpmnpm | >= 11.3.0, < 11.5.3 | 11.5.3 |
Affected products
3- Package: https://www.npmjs.com/package/pnpm
Patches
Vulnerability mechanics
References
4- github.com/pnpm/pnpm/pull/12303nvdPatchWEB
- github.com/pnpm/pnpm/security/advisories/GHSA-v23m-ccfg-pq9hnvdExploitVendor AdvisoryWEB
- github.com/advisories/GHSA-v23m-ccfg-pq9hghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-55700ghsaADVISORY
News mentions
1- Pnpm: Thirteen Vulnerabilities Disclosed Together, Posing Risks of ACE and Supply Chain CompromiseVypr Intelligence · Jun 25, 2026