CVE-2026-16531 Pcp: pcp: arbitrary file creation via path traversal in pmproxy logger servlet
Unauthenticated attackers can create arbitrary files via path traversal in PCP pmproxy, potentially causing denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-16531?
CVE-2026-16531 is a medium-severity path traversal vulnerability in Red Hat Enterprise Linux 10, published on 30 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-16531?
How do I fix CVE-2026-16531?
Apply the vendor's patch.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-16531 being exploited?
There is no known exploitation of CVE-2026-16531 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-16531, GHSA-2g52-w93h-w9v5, UBUNTU-CVE-2026-16531.