← Vulnerability feed

Vulnerability record · CVE-2026-55698 · published 25 June 2026

CVE-2026-55698: Pnpm insufficient verification of data authenticity vulnerability

Pnpm · Pnpm

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.

8.8 CVSS 3.1 High EPSS 0.30% · top 80.0% CWE-345 · Insufficient verification of data authenticityCWE-494 · Download of code without integrity check
8.8CVSS 3.1 base score
0.30%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
30 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjp ExploitVendor Advisory
https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjp ExploitVendor Advisory

Track CVE-2026-55698 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2025-69264Pnpm vulnerabilitypnpm is a package manager. Versions 10.0.0 through 10.25 allow git-hosted dependencies to execute arbitrary code during pnpm install, circumventing t…EPSS 1.0%9.8CVE-2023-37478Pnpm improper access control vulnerabilitypnpm is a package manager. It is possible to construct a tarball that, when installed via npm or parsed by the registry is safe, but when installed v…EPSS 1.2%8.8CVE-2026-55487Pnpm origin validation error vulnerabilitypnpm is a package manager. Prior to 10.34.2 and 11.5.3, the generic peer-suffix normalizer also stripped parenthesized text from git, URL, tarball, f…EPSS 0.18%8.8CVE-2026-55697Pnpm os command injection vulnerabilitypnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can install configDependencies declared in pnpm-workspace.yaml before command dispatch. …EPSS 0.19%8.8CVE-2026-50016Pnpm relative path traversal vulnerabilitypnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm allows a transitive dependency alias from registry package metadata to contain path trav…EPSS 0.53%8.8CVE-2025-69263Pnpm download of code without integrity check vulnerabilitypnpm is a package manager. Versions 10.26.2 and below store HTTP tarball dependencies (and git-hosted tarballs) in the lockfile without integrity has…EPSS 0.48%8.8CVE-2022-26183Pnpm untrusted search path vulnerabilityPNPM v6.15.1 and below was discovered to contain an untrusted search path which causes the application to behave in unexpected ways when users execut…EPSS 1.6%8.2CVE-2026-59195Pnpm path traversal vulnerabilitypnpm is a package manager. Prior to 10.34.4 and 11.8.0, pnpm accepts package names from the env lockfile configDependencies section and uses those na…EPSS 0.40%

Source: NIST National Vulnerability Database (record CVE-2026-55698), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.