CVE-2026-55487 | pnpm is a package manager. Prior to 10.34.2 and 11.5.3, the … | CVSS 7.5 HIGH

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.

Metadata

CVE ID: CVE-2026-55487
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-16 22:28 UTC
Published: 2026-06-25 16:41 UTC
Last updated: 2026-06-25 18:03 UTC
Primary CWE: CWE-346
CWE-346: Origin Validation Error
Vendor / Product: pnpm / pnpm
Sources: cve.org · NVD

Severity & Metrics

7.5 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
pnpm	pnpm	—	< 10.34.2, >= 11.0.0, < 11.5.3

Weakness (CWE)

CWE	Source	Description
CWE-346	cna	CWE-346: Origin Validation Error
CWE-693	cna	CWE-693: Protection Mechanism Failure
CWE-829	cna	CWE-829: Inclusion of Functionality from Untrusted Control Sphere

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.5	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References (1)

https://github.com/pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57r https://github.com/pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57r