CVE-2026-55698
Last modified
CVE-2026-55698 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can persist package-manager bootstrap metadata in the first YAML document of pnpm-lock.yaml. EPSS estimates a 0.17% chance of exploitation in the next 30 days.
Description
pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can persist package-manager bootstrap metadata in the first YAML document of pnpm-lock.yaml. Before the patch, direct pnpm execution trusted an already resolved packageManagerDependencies entry when the committed env lockfile contained matching pnpm and @pnpm/exe versions. A malicious repository could therefore commit package-manager lockfile package records and snapshots that bypassed fresh package-manager resolution, then cause pnpm to install and execute bytes selected by that committed lockfile state during automatic version switching. This vulnerability is fixed in 10.34.2 and 11.5.3.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Pnpm | Pnpm | < 10.34.2 |
| Pnpm | Pnpm | >= 11.0.0, < 11.5.3 |
References
- https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjpExploit, Vendor Advisory
- https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjpExploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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