An unauthenticated remote attacker can bypass access controls by sending crafted requests to the PCP pmproxy /store endpoint. This allows the attacker to overwrite any PMDA metric, leading to arbitrary code execution and system takeover.Referenceshttps://access.redhat.com/errata/RHSA-2026:55560https://access.redhat.com/errata/RHSA-2026:55617https://access.redhat.com/errata/RHSA-2026:55740https://access.redhat.com/errata/RHSA-2026:72272https://access.redhat.com/errata/RHSA-2026:72273https://access.redhat.com/errata/RHSA-2026:72593https://access.redhat.com/errata/RHSA-2026:72594https://access.redhat.com/errata/RHSA-2026:73767https://access.redhat.com/security/cve/CVE-2026-16527https://bugzilla.redhat.com/show_bug.cgi?id=2506031
