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Advisory severityHigh8.8Red Hat Linux

High [CVE-2026-55698] Arbitrary code execution via malicious package-manager lockfile

This high-severity Red Hat Linux advisory covers CVE-2026-55698.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-55698 Source published Source updated

VulniPulse record published Record updated

CVE-2026-55698
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

pnpm is a package manager. Before the patch, direct pnpm execution trusted an already resolved packageManagerDependencies entry when the committed env lockfile contained matching pnpm and @pnpm/exe versions.

This vulnerability is fixed in 10.34.2 and 11.5.3. This can cause pnpm to install and execute attacker-controlled code during automatic version switching.

This can lead to the execution of attacker-controlled code when pnpm is used to install dependencies from such a repository, posing a significant supply chain risk. Red Hat severity: Important — CVSS 8.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H).

Weakness: CWE-502. Red Hat lists 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 as not affected.

Is CVE-2026-55698 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-55698 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-55698?

Upgrade to a fixed release named by Red Hat:

  • 10.34.2
  • 11.5.3

Confirm against the vendor advisory before you patch.

Affected versions
  • < 10.34.2
  • < 11.5.3

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

Fixed versions
  • 10.34.2
  • 11.5.3

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

Mitigation

Upgrade to a fixed release: 10.34.2, 11.5.3. That is the remediation for this advisory.

The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.

Official advisory · high-confidence parse· fetched 15 days ago·verify at source

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