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Vulnerability record · CVE-2026-16527 · published 30 July 2026

CVE-2026-16527: Missing authentication for critical function vulnerability

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.

7.3 CVSS 3.1 High EPSS 0.50% · top 59.8% CWE-306 · Missing authentication for critical functionCWE-284 · Improper access control Awaiting Analysis
7.3CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
21 Aug 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References

LinkTags
https://access.redhat.com/errata/RHSA-2026:55560
https://access.redhat.com/errata/RHSA-2026:55617
https://access.redhat.com/errata/RHSA-2026:55740
https://access.redhat.com/security/cve/CVE-2026-16527
https://bugzilla.redhat.com/show_bug.cgi?id=2506031

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Source: NIST National Vulnerability Database (record CVE-2026-16527), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.