CVE-2026-16527 Pcp: pcp pmproxy: unauthenticated access to /store endpoint allows bypassing pmcd access rules
Unauthenticated attackers can bypass access controls via the pmproxy /store endpoint to overwrite metrics and execute arbitrary code on Red Hat systems.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-16527?
CVE-2026-16527 is a high-severity missing authorization 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 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.
Which versions are affected by CVE-2026-16527?
How do I fix CVE-2026-16527?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-16527 being exploited?
There is no known exploitation of CVE-2026-16527 in the wild and no public exploit code.
Sources
Also known as AZL-94382, DEBIAN-CVE-2026-16527, GHSA-cf63-g57m-mc5r, UBUNTU-CVE-2026-16527.