Is CVE-2026-55487 in the CISA KEV catalog?

No. CVE-2026-55487 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-55487?

CVE-2026-55487 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2026-55487?

CVE-2026-55487 has an EPSS score of 0.12% (2th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-55487?

Upgrade pnpm to 10.34.2 or later.

CVE & CISA-KEV Catalog

CVE-2026-55487

HIGH

7.5

CVSS v3

NVD

Description

pnpm is a package manager. Prior to 10.34.2 and 11.5.3, the generic peer-suffix normalizer also stripped parenthesized text from git, URL, tarball, file, and other opaque locators. Approval for one source string could therefore authorize a different attacker-controlled source whose locator normalized to the same value. This vulnerability is fixed in 10.34.2 and 11.5.3.

CWE-346 CWE-693Protection Mechanism Failure CWE-829

How to fix

Remediation Available

pnpmWindows application

Affected:10.34.2Fixed in:10.34.2pnpm

Affected:11.0.0 11.5.3Fixed in:11.5.3pnpm

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploit Intelligence

0.12%probability of exploitation in 30 days

2ndpercentile

Low risk: more likely to be exploited than 2% of all known CVEs.

References

Exploit1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-29.