CVE-2026-16527

Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules

State: Published
Severity: 7.3 High
Published: Jul 30, 2026
Updated: Oct 1, 2026
Reserved: Jul 22, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	redhat

Weaknesses

CWE-306 Missing Authentication for Critical Function
CWE-284 Improper Access Control

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:7.0.3-5.el10_2 and laterNot affected
Red Hat Enterprise Linux 10.0 Extended Update SupportRed Hat	0:6.3.7-1.el10_0.1 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:5.3.7-22.el8_10.5 and laterNot affected
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRed Hat	0:5.2.5-8.el8_4.1 and laterNot affected
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRed Hat	0:5.2.5-8.el8_4.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRed Hat	0:5.3.5-10.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-OnRed Hat	0:5.3.5-10.el8_6.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRed Hat	0:5.3.7-19.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRed Hat	0:5.3.7-19.el8_8.1 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:6.3.7-8.el9_8.4 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:6.0.1-8.el9_2.2 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:6.2.0-5.el9_4.2 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:6.3.7-1.el9_6.1 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat OpenShift Container Platform 4Red Hat

References

RHSA-2026:55560vendor-advisory
RHSA-2026:55617vendor-advisory
RHSA-2026:55740vendor-advisory
RHSA-2026:72272vendor-advisory
RHSA-2026:72273vendor-advisory
RHSA-2026:72593vendor-advisory
RHSA-2026:72594vendor-advisory
RHSA-2026:73767vendor-advisory
RHSA-2026:74612vendor-advisory
RHSA-2026:74613vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-16527vdb-entry
RHBZ#2506031issue-tracking

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