How severe is CVE-2026-55699?

CVE-2026-55699 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-55699 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-55699?

CVE-2026-55699 affects Pnpm. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-55699?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-55699 have an EU (EUVD) identifier?

Yes. CVE-2026-55699 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39485.

When was CVE-2026-55699 published?

CVE-2026-55699 was published on 2026-06-25 and last updated on 2026-06-29.

CVE-2026-55699

CVE-2026-55699 is a medium-severity vulnerability in Pnpm with a CVSS 3.x base score of 6.5. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39485
Weakness: CWE-22
Affected product: Pnpm
Published: 2026-06-25
Last modified: 2026-06-29

Description

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as "", ".", and ".." passed pnpm's bin-name guard. When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For "." this targets the global bin directory; for ".." this targets its parent. This vulnerability is fixed in 10.34.2 and 11.5.3.

Frequently asked questions

What is CVE-2026-55699?: pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as "", ".", and ".." passed pnpm's bin-name guard. When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For "." this targets the global bin directory; for ".." this targets its parent. This vulnerability is fixed in 10.34.2 and 11.5.3.
How severe is CVE-2026-55699?: CVE-2026-55699 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-55699 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-55699?: CVE-2026-55699 affects Pnpm. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-55699?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-55699 have an EU (EUVD) identifier?: Yes. CVE-2026-55699 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39485.
When was CVE-2026-55699 published?: CVE-2026-55699 was published on 2026-06-25 and last updated on 2026-06-29.

References

https://github.com/pnpm/pnpm/security/advisories/GHSA-4gxm-v5v7-fqc4

Affected products (1)

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

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