CVE-2026-55487

pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle

State: Published
Severity: 7.5 High
Published: Jun 25, 2026
Updated: Jun 25, 2026
Reserved: Jun 16, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
pnpmpnpm	< 10.34.2Affected >= 11.0.0, < 11.5.3Affected

References

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

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