Medium [CVE-2026-55699] Denial of Service due to improper handling of malicious package manifest bin keys
This medium-severity Red Hat Linux advisory covers CVE-2026-55699 affecting Red Hat AMQ Broker 7, Red Hat Build of Keycloak, Red Hat JBoss Enterprise Application Platform 8.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
pnpm is a package manager. Prior to 10.34.2 and 11.5.3, Manifest bin object keys such as "", ".", and ".." passed pnpm's bin-name guard.
When a malicious package was installed globally, later global remove, update, or add-replacement flows could re-derive those names from the installed manifest and pass path.join(globalBinDir, binName) to removeBin. For "." this targets the global bin directory; for ".." this targets its parent.
This vulnerability is fixed in 10.34.2 and 11.5.3. When a malicious package with specially crafted manifest bin object keys (such as "." or "..") is installed globally, subsequent package management operations like removal, update, or replacement could lead to the deletion of critical directories.
This requires an attacker to first trick a user into installing a malicious package globally, limiting the immediate exploitability in typical Red Hat deployments. Red Hat severity: Moderate — CVSS 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H).
Weakness: CWE-22. Affected Red Hat 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.
Red Hat does not currently list a fixing RHSA for this CVE.
Is CVE-2026-55699 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-55699 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-2026-55699?
Upgrade to a fixed release named by Red Hat:
- 10.34.2
- 11.5.3
Confirm against the vendor advisory before you patch.
- < 10.34.2
- < 11.5.3
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
- 10.34.2
- 11.5.3
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation checklist
- To mitigate this issue, users should avoid installing pnpm packages from untrusted sources globally. Exercise caution and verify the integrity of packages before global installation to prevent the introduction of malicious manifest bin keys.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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