{"id":"CVE-2026-16527","state":"PUBLISHED","title":"Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules","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.","publishedAt":"2026-07-30T05:30:16.930Z","updatedAt":"2026-10-01T23:22:57.484Z","severity":{"score":7.3,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","source":"redhat"},"assigner":"redhat","products":["Red Hat Red Hat Enterprise Linux 10","Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support","Red Hat Red Hat Enterprise Linux 8","Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","Red Hat Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","Red Hat Red Hat Enterprise Linux 8.8 Telecommunications Update Service","Red Hat Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","Red Hat Red Hat Enterprise Linux 9","Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","Red Hat Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions","Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support","Red Hat Red Hat Enterprise Linux 6","Red Hat Red Hat Enterprise Linux 7","Red Hat Red Hat OpenShift Container Platform 4"],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:7.0.3-5.el10_2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.3.7-1.el10_0.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.7-22.el8_10.5","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.2.5-8.el8_4.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream","cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.2.5-8.el8_4.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream","cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.5-10.el8_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.5-10.el8_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.7-19.el8_8.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.7-19.el8_8.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.3.7-8.el9_8.4","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.0.1-8.el9_2.2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.2::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.2.0-5.el9_4.2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.3.7-1.el9_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","packageName":"pcp","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","packageName":"pcp","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","packageName":"openshift/ose-rhel-coreos-9","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"]}],"references":["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/errata/RHSA-2026:72272","https://access.redhat.com/errata/RHSA-2026:72273","https://access.redhat.com/errata/RHSA-2026:72593","https://access.redhat.com/errata/RHSA-2026:72594","https://access.redhat.com/errata/RHSA-2026:73767","https://access.redhat.com/errata/RHSA-2026:74612","https://access.redhat.com/errata/RHSA-2026:74613","https://access.redhat.com/security/cve/CVE-2026-16527","https://bugzilla.redhat.com/show_bug.cgi?id=2506031"],"weaknesses":["CWE-306","CWE-284"],"ingestedAt":"2026-10-29T20:11:00.674Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/16xxx/CVE-2026-16527.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-16527","state":"PUBLISHED","datePublished":"2026-07-30T05:30:16.930Z","dateUpdated":"2026-10-01T23:22:57.484Z","assignerShortName":"redhat","assignerOrgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateReserved":"2026-07-22T07:36:03.699Z"},"containers":{"cna":{"title":"Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:7.0.3-5.el10_2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:10.2"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 10.0 Extended Update Support","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.3.7-1.el10_0.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux_eus:10.0"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.7-22.el8_10.5","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.2.5-8.el8_4.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream","cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.2.5-8.el8_4.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.4::appstream","cpe:/a:redhat:rhel_eus_long_life:8.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.5-10.el8_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.5-10.el8_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_aus:8.6::appstream","cpe:/a:redhat:rhel_eus_long_life:8.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Telecommunications Update Service","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.7-19.el8_8.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:5.3.7-19.el8_8.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:8.8::appstream","cpe:/a:redhat:rhel_tus:8.8::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.3.7-8.el9_8.4","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:enterprise_linux:9::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.0.1-8.el9_2.2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.2::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.2.0-5.el9_4.2","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_e4s:9.4::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 9.6 Extended Update Support","packageName":"pcp","defaultStatus":"affected","versions":[{"version":"0:6.3.7-1.el9_6.1","status":"unaffected","lessThan":"*","versionType":"rpm"}],"collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:rhel_eus:9.6::appstream"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 6","packageName":"pcp","defaultStatus":"unknown","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:6"]},{"vendor":"Red Hat","product":"Red Hat Enterprise Linux 7","packageName":"pcp","defaultStatus":"affected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/o:redhat:enterprise_linux:7"]},{"vendor":"Red Hat","product":"Red Hat OpenShift Container Platform 4","packageName":"openshift/ose-rhel-coreos-9","defaultStatus":"unaffected","collectionURL":"https://access.redhat.com/downloads/content/package-browser/","cpes":["cpe:/a:redhat:openshift:4"]}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:55560","name":"RHSA-2026:55560","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:55617","name":"RHSA-2026:55617","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:55740","name":"RHSA-2026:55740","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:72272","name":"RHSA-2026:72272","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:72273","name":"RHSA-2026:72273","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:72593","name":"RHSA-2026:72593","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:72594","name":"RHSA-2026:72594","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:73767","name":"RHSA-2026:73767","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:74612","name":"RHSA-2026:74612","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:74613","name":"RHSA-2026:74613","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-16527","tags":["vdb-entry","x_refsource_REDHAT"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2506031","name":"RHBZ#2506031","tags":["issue-tracking","x_refsource_REDHAT"]}],"metrics":[{"other":{"content":{"value":"Important","namespace":"https://access.redhat.com/security/updates/classification/"},"type":"Red Hat severity rating"}},{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.3,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"format":"CVSS"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","description":"Missing Authentication for Critical Function","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"redhat","orgId":"53f830b8-0a3f-465b-8143-3b8a9948e749","dateUpdated":"2026-10-01T23:22:57.484Z"},"datePublic":"2026-07-30T00:00:00.000Z","x_redhatCweChain":"CWE-306: Missing Authentication for Critical Function","workarounds":[{"lang":"en","value":"To mitigate this issue, restrict network access to the pmproxy service (port 44322/TCP) to trusted hosts only using firewall rules. If pmproxy functionality is not required, disable the service. Disabling the service will prevent remote access to performance metrics via pmproxy. To disable the service, run: `sudo systemctl stop pmproxy` and `sudo systemctl disable pmproxy`. If firewalling, ensure to reload the firewall rules after making changes."}],"timeline":[{"lang":"en","time":"2026-07-22T07:31:32.197Z","value":"Reported to Red Hat."},{"lang":"en","time":"2026-07-30T00:00:00.000Z","value":"Made public."}],"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-31T22:41:09.261852Z","id":"CVE-2026-16527","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-284","type":"CWE","lang":"en","description":"CWE-284 Improper Access Control"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-31T22:41:42.714Z"}}]}}}