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Fencer Vulns
medium 5.3

CVE-2026-16531 json

Pcp: pcp: arbitrary file creation via path traversal in pmproxy logger servlet

published 2026-07-30 3 mo ago modified 2026-11-05 3 d ago also EUVD-2026-50980

cvss
5.3
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

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.

Patch / fix

  • pcp Debian 14 7.2.0-1

debian advisories DEBIAN-CVE-2026-16531

  • pcp SLES 16.0, Linux Micro 6.2, SLES for SAP applications 16.0 6.2.0-160000.4.1
  • pcp Linux Micro 6.1 6.2.0-slfo.1.1_6.1
  • pcp Linux Micro 6.0 6.2.0-2.1
  • pcp SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 6.2.0-150600.3.12.1
  • pcp SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 6.2.0-150400.5.15.1
  • pcp SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 6.2.0-150500.8.9.1
  • pcp SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 6.2.0-6.32.1

suse advisories SUSE-SU-2026:23277-1SUSE-SU-2026:23316-1SUSE-SU-2026:23174-1SUSE-SU-2026:23064-1SUSE-SU-2026:3508-1SUSE-SU-2026:3507-1

  • pcp openSUSE Leap 16.0 6.2.0-160000.4.1
  • pcp openSUSE Tumbleweed 6.3.8-3.1

opensuse advisories openSUSE-SU-2026:21636-1openSUSE-SU-2026:11490-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-16531 updated cvss 5.3

PCP: PCP: Arbitrary file creation via path traversal in pmproxy logger servlet

  • Red Hat Enterprise Linux 6 pcp, pcp-gui, pcp-conf, pcp-libs, pcp-webjs, pcp-webapi, +71 more Red Hat Enterprise Linux 7 pcp, pcp-gui, pcp-conf, pcp-libs, pcp-webjs, pcp-webapi, +89 more
    affected: workaround, no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 8 pcp, pcp-gui, pcp-conf, pcp-libs, pcp-manager, pcp-pmda-dm, +94 more Red Hat Enterprise Linux 9 pcp, pcp-gui, pcp-conf, pcp-libs, pcp-pmda-dm, pcp-selinux, +98 more
    affected: workaround, no fix available “Fix deferred”
  • Red Hat Enterprise Linux 10 pcp
    affected: workaround, no fix available
  • Red Hat OpenShift Container Platform 4 openshift/ose-rhel-coreos-9 Red Hat OpenShift Container Platform 5 openshift/ose-rhel-coreos-9
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
3 mo ago

Exploit prediction

0.51% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat OpenShift Container Platform 4
  • Red Hat Red Hat OpenShift Container Platform 5

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.