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CVE-2026-55698

Pnpm vulnerability

8.8 HIGHPublic exploitEPSS 0.30%
  1. Published25 Jun 2026

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Pnpm≥ 11.0.0 < 11.5.3 · < 10.34.2

Remediation

Fixed in
Pnpm≥ 11.5.3

References

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Frequently asked

Is CVE-2026-55698 being actively exploited?

CVE-2026-55698 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.30%.

How severe is CVE-2026-55698?

CVE-2026-55698 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.30% probability of exploitation.

Which products are affected by CVE-2026-55698?

Affected products include Pnpm.

How do I fix CVE-2026-55698?

Upgrade affected software to a fixed version, for example Pnpm 11.5.3 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-55698 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.