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CVE-2026-16527— Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

pcp是pcp组织开源的一个系统性能分析工具包。 pcp存在安全漏洞，该漏洞源于PCP pmproxy /store端点存在访问控制绕过，攻击者可通过发送特制请求覆盖任意PMDA指标，导致任意代码执行和系统接管。

CVSS 7.3 · High EPSS 0.50% · P41

Affected Version Matrix 6

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:7.0.3-5.el10_2< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 0:5.3.7-22.el8_10.5< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:6.3.7-8.el9_8.4< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any unaffected
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I. Basic Information for CVE-2026-16527

Vulnerability Information
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Vulnerability Title
Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
pcp 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
pcp是pcp组织开源的一个系统性能分析工具包。 pcp存在安全漏洞，该漏洞源于PCP pmproxy /store端点存在访问控制绕过，攻击者可通过发送特制请求覆盖任意PMDA指标，导致任意代码执行和系统接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 0:7.0.3-5.el10_2 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Enterprise Linux 8 0:5.3.7-22.el8_10.5 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 9 0:6.3.7-8.el9_8.4 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-16527

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III. Intelligence Information for CVE-2026-16527

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Vendor Advisories for CVE-2026-16527 (5)

Same Patch Batch · Red Hat · 2026-07-30 · 15 CVEs total

CVE-2026-16526 8.8 HIGH Pcp: pcp: privilege escalation to root via linux_sockets pmda vulnerability
CVE-2026-58222 8.8 HIGH Samba: samba ad ldap compare filter injection and trusted-request confusion disclose prote
CVE-2026-16524 7.8 HIGH Pcp: pcp linux_sockets pmda: arbitrary command execution via command injection
CVE-2026-18381 7.6 HIGH Project-koku/koku-metrics-operator: koku-metrics-operator: operator service-account token
CVE-2026-18378 7.6 HIGH Project-koku/koku-metrics-operator: koku-metrics-operator: cluster pull-secret token exfil
CVE-2026-16529 7.5 HIGH Pcp: pcp: denial of service due to signed integer overflow
CVE-2026-18382 6.8 MEDIUM Project-koku/koku-metrics-operator: koku-metrics-operator: service-account client credenti
CVE-2026-16530 6.5 MEDIUM Pcp: pcp: remote denial of service and information leakage
CVE-2026-68562 6.2 MEDIUM Ansible-collection-redhat-leapp: ansible-collection-redhat-leapp: information disclosure v
CVE-2026-18369 5.8 MEDIUM Dogtag-pki: pki-core: redhat-pki: pki: acme http-01 validation ssrf via ip literal identif
CVE-2026-68563 5.5 MEDIUM Ansible-collection-redhat-leapp: ansible-collection-redhat-leapp: information disclosure o
CVE-2026-16531 5.3 MEDIUM Pcp: pcp: arbitrary file creation via path traversal in pmproxy logger servlet
CVE-2026-58218 5.3 MEDIUM Samba: dns signing dos via tkey name cache exhaustion
CVE-2026-58216 5.3 MEDIUM Samba: kpasswd service: kpasswd packet that contains malformed asn.1 might cause the serve

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-306

V. Comments for CVE-2026-16527

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