Read the docs
TI-2026-40042 Aliases CVE-2026-55487GHSA-5wx6-mg75-v57r

pnpm: manifest identity spoof satisfies allowBuilds and runs attacker lifecycle

Priority HIGH 73CWE-346Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Security bypass, Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-346 and CWE-829.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00181 7th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed pnpm (pnpm): 10.34.2, 11.5.3pnpm (npm): 10.34.2, 11.5.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
pnpmpnpmbefore 10.34.2; 11.0.0 to before 11.5.310.34.2, 11.5.3Patch availableCNA
—pnpm (npm)before 10.34.210.34.2Patch availableGHSA-5wx6-mg75-v57r
—pnpm (npm)11.0.0 to before 11.5.311.5.3Patch availableGHSA-5wx6-mg75-v57r
  • pnpm Vendorpnpm Affected before 10.34.2; 11.0.0 to before 11.5.3 Fixed in 10.34.2, 11.5.3 Patch available CNA
  • pnpm (npm) Vendor— Affected before 10.34.2 Fixed in 10.34.2 Patch available GHSA-5wx6-mg75-v57r
  • pnpm (npm) Vendor— Affected 11.0.0 to before 11.5.3 Fixed in 11.5.3 Patch available GHSA-5wx6-mg75-v57r

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:*before 10.34.2; 11.0.0 to before 11.5.3Vulnerablepnpm
  • cpe:2.3:a:pnpm:pnpm:*:*:*:*:*:node.js:*:* Versions before 10.34.2; 11.0.0 to before 11.5.3 Vulnerable ·pnpm

Remediation

  • Fix · CNA pnpm (pnpm) Fixed in 10.34.2, 11.5.3
  • Fix · GHSA-5wx6-mg75-v57r pnpm (npm) Fixed in 10.34.2 Advisory →
  • Fix · GHSA-5wx6-mg75-v57r pnpm (npm) Fixed in 11.5.3 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Not affected: 4 products
  • Red Hat AMQ Broker 7
  • Red Hat Build of Keycloak
  • Red Hat JBoss Enterprise Application Platform 8
  • Red Hat JBoss Enterprise Application Platform Expansion Pack

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55487
  2. 2026-10-03 Alias added: GHSA-5wx6-mg75-v57r

References

Exploit 1

Advisory 1

Other 4

  • TI-2025-42715 pnpm v10+ Bypass "Dependency lifecycle scripts execution disabled by default" CVSS 3.1CRITICAL 9.8
  • TI-2023-19086 pnpm incorrectly parses tar archives relative to specification CVSS 3.1CRITICAL 9.8
  • TI-2026-40212 pnpm: Project env lockfile can short-circuit package-manager resolution and execute lockfile-selected pnpm bytes CVSS 3.1HIGH 8.8
  • TI-2026-40211 pnpm: Repository-controlled configDependencies can select a pacquet native install engine CVSS 3.1HIGH 8.8
  • TI-2026-36842 pnpm: Transitive dependency alias path traversal allows project path override via symlink replacement CVSS 3.1HIGH 8.8
  • TI-2025-42714 pnpm Lockfile Integrity Bypass Allows Remote Dynamic Dependencies CVSS 3.1HIGH 8.8
See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences