High8.8Red 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 affecting Red Hat Build of Keycloak.

CVE-2026-55698 Published Jun 25, 2026Updated by vendor Jun 25, 2026

CVE-2026-55698

Affected products & platforms

Red Hat LinuxUnclassified

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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. Affected Red Hat products: Red Hat Build of Keycloak.

Red Hat lists Red Hat AMQ Broker 7; Red Hat JBoss Enterprise Application Platform 8; Red Hat JBoss Enterprise Application Platform Expansion Pack as not affected. Red Hat does not currently list a fixing RHSA for this CVE.

Affected versions

< 10.34.2
< 11.5.3

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

Fixed versions

10.34.2
11.5.3

Official advisory · high-confidence parse· fetched 14 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 additional interim mitigations or workarounds not captured here — review it before change work.

Official advisory · high-confidence parse· fetched 14 days ago·verify at source

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