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CVE-2026-55700

Pnpm path traversal

7.1 HIGHPublic exploitEPSS 0.42%
  1. Published25 Jun 2026

Description

pnpm is a package manager. From 11.3.0 until 11.5.3, `pnpm stage download` derived a local filename from registry-controlled package name and version fields. A crafted manifest could escape the selected download directory and overwrite another reachable file. The merged fix validates both fields, derives one safe filename, and verifies the final destination before writing. This vulnerability is fixed in 11.5.3.

CVSS 3.1 breakdown

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

Affected products

Pnpm≥ 11.3.0 < 11.5.3

Remediation

Fixed in
Pnpm≥ 11.5.3

References

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Frequently asked

Is CVE-2026-55700 being actively exploited?

CVE-2026-55700 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.42%.

How severe is CVE-2026-55700?

CVE-2026-55700 has a CVSS 3.1 base score of 7.1, rated high. EPSS estimates a 0.42% probability of exploitation.

Which products are affected by CVE-2026-55700?

Affected products include Pnpm.

How do I fix CVE-2026-55700?

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-2026-55700 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.