EUVD-2026-75115
GHSA-9xm7-6q66-g534
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N and PR:N because memcached is unauthenticated over the network; AC:H because the attacker must reach a memcached instance that is typically localhost-bound or network-firewalled.
Primary rating from Vendor (redhat).
CVSS VectorNVD
Lifecycle Timeline
3DescriptionNVD
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.
Articles & Coverage 1
AnalysisAI
Remote code execution via unsafe Python pickle deserialization in the community.general Ansible collection's memcached fact cache plugin gives unauthenticated network-adjacent attackers full control of the Ansible controller. Despite documenting JSON as its storage format, the plugin delegates serialization entirely to python-memcached, which transparently pickles Python objects on write and unpickles them on read - a format that executes arbitrary Python code during deserialization. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires three concurrent conditions: (1) the Ansible controller must be configured to use the community.general.memcached cache plugin as the fact caching backend - set via 'fact_caching = community.general.memcached' in ansible.cfg, which is a non-default, explicitly operator-chosen configuration; (2) the memcached instance must be reachable by the attacker over the network, meaning it is not restricted to localhost (127.0.0.1) and is not protected by a host or network firewall on port 11211; and (3) the attacker must be able to write to memcached, which requires no credentials since memcached has no native authentication. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H (8.1) is well-calibrated: AC:H reflects the realistic prerequisite that the attacker must reach a memcached instance, which in correctly architected deployments is bound to localhost or a restricted management VLAN rather than the public internet. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No specific patched version of the community.general collection is identified in the available intelligence; organizations should monitor https://access.redhat.com/security/cve/CVE-2026-87874 and https://bugzilla.redhat.com/show_bug.cgi?id=2530995 for Red Hat errata and apply vendor-issued patches for affected products when released. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all Ansible deployments using community.general collection with memcached fact caching enabled and document network connectivity to memcached instances. …
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External POC / Exploit Code
Leaving vuln.today