CVE-2026-55487

HIGH

pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0012
EPSS Percentile 2.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-346 CWE-693 CWE-829
Status published
Products (4)
npm/pnpm 0 - 10.34.2npm
npm/pnpm 11.0.0 - 11.5.3npm
pnpm/pnpm < 10.34.2 (2 CPE variants)
pnpm/pnpm >= 11.0.0, < 11.5.3
Published Jun 25, 2026
Tracked Since Jun 25, 2026