CVE-2026-55487

pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle

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.

Affected

pnpm

CVSS v3.1 NVD

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CVSS v3.1 GITHUB

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

EPSS

0.18% chance of exploitation in the next 30 days, 7th percentile

Published

2026-06-25

Proof-of-concept exploits (1)

• advisories/GHSA-5wx6-mg75-v57r

Security advisories

• pnpm/pnpm/security/advisories/GHSA-5wx6-mg75-v57r

References

• CVE Record
• NVD entry