CVE-2026-55487

[CVE catalog]

Severity

High · CVSS 7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Published

Jun 25, 2026, 4:41:12 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.18% · Oct 25, 2026

A flaw was found in pnpm, a package manager. This vulnerability allows a remote attacker to bypass security checks by manipulating how package source strings are processed. By crafting a specially designed source string, an attacker could trick the system into approving and using a malicious package instead of the intended one. This could lead to the execution of unauthorized code or the installation of harmful software, severely impacting the confidentiality, integrity, and availability of the system. pnpm: pnpm: Supply chain compromise via manipulated package source strings This Important vulnerability in pnpm allows an attacker to bypass security checks by manipulating package source strings. This could lead to the execution of unauthorized code or the installation of malicious software. The flaw arises from the package manager's normalization of opaque locators, where an approved source string could inadvertently authorize a different, attacker-controlled source. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.