CVE-2026-55698: pnpm is a package manager

Q: How do I fix CVE-2026-55698?

pnpm: upgrade to 10.34.2, 11.5.3. Exact commands for each OS are on this page.

Q: Is CVE-2026-55698 being exploited?

CVE-2026-55698 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-55698 affect?

CVE-2026-55698 affects pnpm. Severity is high (CVSS 8.8). 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 packageManagerDepe

Q: How urgent is CVE-2026-55698?

Priority 41/100. High severity; Public exploit reference

This month

HIGH 8.8UPGRADE

CVE-2026-55698 is a high-severity flaw (CVSS 8.8) affecting pnpm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-345, CWE-494, CWE-829
Published	2026-06-25
Last modified	2026-06-30

Publisher (CNA): GitHub, Inc. · Vendor: pnpm

Last updated 2026-06-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-06-25 18:16 UTCPublished CVE record published
2026-06-30 19:03 UTCUpdated Record last modified

pnpm pnpm UPGRADE

Affected: < 10.34.2 · >= 11.0.0 and < 11.5.3

Fixed in: 10.34.2, 11.5.3

Safe to downgrade to: a release before 11.0.0

1. Check installed version

npm ls pnpm

2. UPGRADE to 10.34.2

npm install pnpm@">=10.34.2"

3. If no update is available yet, DOWNGRADE to a release before 11.0.0

npm view pnpm versions npm install pnpm@"<11.0.0"

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-55698?

pnpm: upgrade to 10.34.2, 11.5.3. Exact commands for each OS are on this page.

Is CVE-2026-55698 being exploited?

CVE-2026-55698 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-55698 affect?

CVE-2026-55698 affects pnpm. Severity is high (CVSS 8.8). 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 packageManagerDepe

How urgent is CVE-2026-55698?

Priority 41/100. High severity; Public exploit reference

Software pages

Bootstrap vulnerabilities

Related CVEs

CVE-2026-59195 HIGH 8.2 UPGRADE pnpm is a package manager
CVE-2026-59196 HIGH 7.1 UPGRADE pnpm is a package manager
CVE-2026-59194 HIGH 7.1 UPGRADE pnpm is a package manager
CVE-2026-50017 MEDIUM 6.5 UPGRADE pnpm is a package manager
CVE-2026-55697 HIGH 7.5 UPGRADE pnpm is a package manager

References

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