CVE-2026-87874 Deserialization in Red Hat Ceph Storage 5
An attacker with network access to memcached can inject malicious pickle data, leading to remote code execution on the Ansible controller.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87874?
CVE-2026-87874 is a high-severity unsafe deserialization vulnerability in Red Hat Ceph Storage 5, published on 9 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in the memcached cache plugin of the community.general Ansible collection. Although its documentation states that records are stored in JSON format, the plugin performs no explicit serialization and relies on python-memcached, which pickles values on write and unpickles them on read. Because memcached is unauthenticated and cache keys are predictable, an attacker able to reach a network-exposed or shared memcached instance can write a crafted pickle payload that is deserialized and executed on the Ansible controller when the poisoned fact cache is next read, leading to remote code execution.
Weakness: CWE-502
Which versions are affected by CVE-2026-87874?
How do I fix CVE-2026-87874?
No fix has been published for CVE-2026-87874 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-87874 being exploited?
There is no known exploitation of CVE-2026-87874 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-87874, GHSA-9xm7-6q66-g534, UBUNTU-CVE-2026-87874.