How severe is CVE-2026-55698?

CVE-2026-55698 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-55698 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-55698?

CVE-2026-55698 affects Pnpm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-55698?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-55698 have an EU (EUVD) identifier?

Yes. CVE-2026-55698 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39484.

When was CVE-2026-55698 published?

CVE-2026-55698 was published on 2026-06-25 and last updated on 2026-06-30.

CVE-2026-55698

CVE-2026-55698 is a high-severity vulnerability in Pnpm with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-345.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39484
Weakness: CWE-345
Affected product: Pnpm
Published: 2026-06-25
Last modified: 2026-06-30

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.

Frequently asked questions

What is CVE-2026-55698?: 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.
How severe is CVE-2026-55698?: CVE-2026-55698 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-55698 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-55698?: CVE-2026-55698 affects Pnpm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-55698?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-55698 have an EU (EUVD) identifier?: Yes. CVE-2026-55698 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39484.
When was CVE-2026-55698 published?: CVE-2026-55698 was published on 2026-06-25 and last updated on 2026-06-30.

References

https://github.com/pnpm/pnpm/security/advisories/GHSA-w466-c33r-3gjp

Affected products (1)

cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:*

More vulnerabilities in Pnpm

CVE-2024-53866 — Critical (CVSS 9.8): The package manager pnpm prior to version 9.15.0 seems to mishandle overrides and global cache: Overrides from one…
CVE-2026-50016 — High (CVSS 8.8): pnpm is a package manager. Prior to 10.34.0 and 11.4.0, pnpm allows a transitive dependency alias from registry package…
CVE-2025-69264 — High (CVSS 8.8): pnpm is a package manager. Versions 10.0.0 through 10.25 allow git-hosted dependencies to execute arbitrary code during…
CVE-2022-26183 — High (CVSS 8.8): PNPM v6.15.1 and below was discovered to contain an untrusted search path which causes the application to behave in…
CVE-2026-59195 — High (CVSS 8.2): pnpm is a package manager. Prior to 10.34.4 and 11.8.0, pnpm accepts package names from the env lockfile…
CVE-2026-55697 — High (CVSS 7.5): pnpm is a package manager. Prior to 10.34.2 and 11.5.3, pnpm can install configDependencies declared in…

All CVEs affecting Pnpm →

Other CWE-345 (Insufficient Verification of Data Authenticity) vulnerabilities

CVE-2026-35051 — Critical (CVSS 10.0): Traefik is an HTTP reverse proxy and load balancer. Prior to versions 2.11.43, 3.6.14, and 3.7.0-rc.2, there is an…
CVE-2014-8165 — Critical (CVSS 10.0): scripts/amsvis/powerpcAMS/amsnet.py in powerpc-utils-python uses the pickle Python module unsafely, which allows remote…
CVE-2026-50195 — Critical (CVSS 9.9): containerd is an open-source container runtime. Versions prior to 2.3.2, 2.2.5 and 2.1.9 contain a vulnerability in the…
CVE-2022-36130 — Critical (CVSS 9.9): HashiCorp Boundary up to 0.10.1 did not properly perform data integrity checks to ensure the resources were associated…
CVE-2026-50214 — Critical (CVSS 9.8): The /v1/Plan service relies entirely on a shared global API token for full administrative management, allowing…
CVE-2025-15385 — Critical (CVSS 9.8): Insufficient Verification of Data Authenticity vulnerability in TECNO Mobile com.Afmobi.Boomplayer allows…

Browse all CWE-345 (Insufficient Verification of Data Authenticity) vulnerabilities →