Insertion of Sensitive Information Into Sent Data in pnpm - CVE-2026-55180
Published: June 15, 2026
Vulnerability identifier: #VU134550
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-55180
CWE-ID: CWE-201
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to insertion of sensitive information into sent data in repository-controlled .npmrc and pnpm-workspace.yaml registry and auth configuration handling when processing environment variable placeholders in registry request destinations and credential values. A remote attacker can trick the victim into running a dependency-management command in a malicious repository to disclose sensitive information.
User interaction is required, and the disclosure can occur before lifecycle scripts run.
Affected software
pnpm
How to mitigate CVE-2026-55180
Install security update from vendor's website.
pnpm - addressed in versions 11.0.0, 11.5.3