What’s Vulnerable › Vulnerabilities

CVE-2026-55180: pnpm: Repository config can expand victim environment secrets into registry requests before scripts run

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-25 · updated 2026-06-29
• Weakness: CWE-200

Description

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm and pacquet expanded ${ENV_VAR} placeholders from repository-controlled .npmrc and pnpm-workspace.yaml into registry request destinations and registry credentials. A malicious repository could cause dependency resolution to send victim environment secrets to an attacker-selected registry before lifecycle scripts run. This vulnerability is fixed in 10.34.2 and 11.5.3.

Affected products

• pnpm: before 10.34.2; from 11.0.0 before 11.5.3 — fixed in 10.34.2, 11.5.3

How to fix

Upgrade to a fixed version: pnpm 10.34.2, 11.5.3. Check the vendor advisory for mitigations.

References

• https://github.com/pnpm/pnpm/security/advisories/GHSA-3qhv-2rgh-x77r
• https://github.com/pnpm/pnpm/security/advisories/GHSA-3qhv-2rgh-x77r

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