High 7.1Published Jun 25, 2026

CVE-2026-55700pnpm: stage download writes outside destination via manifest version traversal

Updated under an hour ago (Oct 25, 2026, 8:10 PM ET)

Does this affect you?

It affects pnpm. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for pnpm

Exploited in the last 30 days

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.

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L
Weakness (CWE): CWE-22, CWE-73
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jun 25, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

pnpm pnpm pnpm:pnpm (from the name)	from 11.3.0, < 11.5.3	CNA record
pnpm pnpm pnpm:pnpm	from 11.3.0 before 11.5.3	NVD

References

https://github.com/pnpm/pnpm/security/advisories/GHSA-v23m-ccfg-pq9hx-refsource-confirm, exploit, vendor-advisory
https://github.com/pnpm/pnpm/pull/12303x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.