CVE-2026-55180 pnpm: Repository config can expand victim environment secrets into registry requests before scripts run
A malicious repository can leak victim environment secrets to an attacker-controlled registry during dependency resolution in pnpm.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-55180?
CVE-2026-55180 is a medium-severity vulnerability in pnpm, published on 25 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-55180?
4 open source packages ship an affected version, including pnpm. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pnpm npm | All versions | 10.34.2 |
pnpm npm | All versions | 10.34.2 |
pnpm npm | From 11.0.0 | 11.5.3 |
pnpm npm | From 11.0.0 | 11.5.3 |
Products include Pnpm Pnpm.
How do I fix CVE-2026-55180?
Upgrade pnpm to a fixed version for your release line: 10.34.2 or 11.5.3.
Is CVE-2026-55180 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-55180 exists.
Other vulnerabilities in pnpm
- CVE-2026-50016 pnpm: Transitive dependency alias path traversal allows project path override via symlink replacement
- CVE-2026-55698 pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfile-selected pnpm bytes
- CVE-2025-69264 pnpm v10+ Bypass "Dependency lifecycle scripts execution disabled by default"
- CVE-2022-26183 Untrusted Search Path in PNPM
- CVE-2026-59195 pnpm: Path traversal in configDependencies env lockfile allows symlink creation outside node_modules/.pnpm-config
Sources
Also known as GHSA-3qhv-2rgh-x77r, MINI-hcf4-cm48-ccpg, ROOT-APP-NPM-CVE-2026-55180.