Medium [CVE-2026-16531] Arbitrary file creation via path traversal in pmproxy logger servlet
This medium-severity Red Hat Linux advisory covers CVE-2026-16531 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
An unauthenticated remote attacker can exploit a path traversal vulnerability in the PCP pmproxy logger servlet using a crafted hostname. This allows arbitrary file and directory creation, potentially leading to a denial of service.
This can lead to a denial of service or other impacts on systems where pmproxy is exposed on TCP port 44322, as the logger servlet is unconditionally active. Red Hat severity: Moderate — CVSS 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N).
Weakness: CWE-22. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.
Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: pcp.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
Mitigation checklist
- To mitigate this issue, restrict network access to TCP port 44322, which is used by the pmproxy service. This can be achieved by configuring a firewall to block incoming connections to this port. Alternatively, if the pmproxy service is not essential for your environment, it can be disabled. To disable the pmproxy service: sudo systemctl stop pmproxy sudo systemctl disable pmproxy Warning: Disabling pmproxy may impact the functionality of Performance Co-Pilot components that rely on it for data collection and logging.
Official advisory · high-confidence parse· fetched 1 month ago·verify at source
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