High [CVE-2026-55487] Supply chain compromise via manipulated package source strings
This high-severity Red Hat Linux advisory covers CVE-2026-55487 affecting Red Hat Build of Keycloak.
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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.
This vulnerability allows a remote attacker to bypass security checks by manipulating how package source strings are processed. By crafting a specially designed source string, an attacker could trick the system into approving and using a malicious package instead of the intended one.
This could lead to the execution of unauthorized code or the installation of harmful software, severely impacting the confidentiality, integrity, and availability of the system. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).
Weakness: CWE-140. 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.
- < 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
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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