Vulnerability-Lookup

CVE-2026-16527 (GCVE-0-2026-16527)

Vulnerability from cvelistv5 – Published: 2026-07-30 05:30 – Updated: 2026-07-30 05:30

Title

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

Summary

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.

Severity

7.3 (High)


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

Assigner

redhat

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-16527	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2506031	issue-trackingx_refsource_REDHAT

Impacted products

6 products

Vendor	Product	Version
Red Hat	Red Hat Enterprise Linux 10	cpe:/o:redhat:enterprise_linux:10
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 Enterprise Linux 8	cpe:/o:redhat:enterprise_linux:8
Red Hat	Red Hat Enterprise Linux 9	cpe:/o:redhat:enterprise_linux:9
Red Hat	Red Hat OpenShift Container Platform 4	cpe:/a:redhat:openshift:4

Date Public

2026-07-30 00:00

Show details on NVD website

JSON

To clipboard

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          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
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          "packageName": "pcp",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:6"
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          "defaultStatus": "unknown",
          "packageName": "pcp",
          "product": "Red Hat Enterprise Linux 6",
          "vendor": "Red Hat"
        },
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:7"
          ],
          "defaultStatus": "affected",
          "packageName": "pcp",
          "product": "Red Hat Enterprise Linux 7",
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          "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
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          "defaultStatus": "affected",
          "packageName": "pcp",
          "product": "Red Hat Enterprise Linux 8",
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          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
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          "product": "Red Hat Enterprise Linux 9",
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          "cpes": [
            "cpe:/a:redhat:openshift:4"
          ],
          "defaultStatus": "affected",
          "packageName": "rhcos",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        }
      ],
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      "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."
        }
      ],
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            "availabilityImpact": "LOW",
            "baseScore": 7.3,
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            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
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            "userInteraction": "NONE",
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            "version": "3.1"
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      "providerMetadata": {
        "dateUpdated": "2026-07-30T05:30:16.930Z",
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        "shortName": "redhat"
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      "references": [
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          "tags": [
            "vdb-entry",
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          ],
          "url": "https://access.redhat.com/security/cve/CVE-2026-16527"
        },
        {
          "name": "RHBZ#2506031",
          "tags": [
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            "x_refsource_REDHAT"
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506031"
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      "timeline": [
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          "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."
        }
      ],
      "title": "Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules",
      "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."
        }
      ],
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    "dateReserved": "2026-07-22T07:36:03.699Z",
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    "state": "PUBLISHED"
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    "redhat_vex": {
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      "initial_release_date": "2026-07-30T00:00:00+00:00",
      "product_status:known_affected": "502",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "PCP: PCP pmproxy: Unauthenticated access to /store endpoint allows bypassing pmcd access rules",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-16527.json",
      "version": "3"
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}

GHSA-CF63-G57M-MC5R

Vulnerability from github – Published: 2026-07-30 06:32 – Updated: 2026-07-30 06:32

Details

Severity

7.3 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-16527"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-30T06:25:02Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-cf63-g57m-mc5r",
  "modified": "2026-07-30T06:32:37Z",
  "published": "2026-07-30T06:32:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16527"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2026-16527"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2506031"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-16527 (GCVE-0-2026-16527)

GHSA-CF63-G57M-MC5R

Tags

Sightings

Nomenclature