CVE-2021-32699: Asymmetric Resource Consumption (Amplification) in Docker containers created by Wings

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-22 · updated 2026-06-17
Weakness: CWE-400

Description

Wings is the control plane software for the open source Pterodactyl game management system. All versions of Pterodactyl Wings prior to `1.4.4` are vulnerable to system resource exhaustion due to improper container process limits being defined. A malicious user can consume more resources than intended and cause downstream impacts to other clients on the same hardware, eventually causing the physical server to stop responding. Users should upgrade to `1.4.4` to mitigate the issue. There is no non-code based workaround for impacted versions of the software. Users running customized versions of this software can manually set a PID limit for containers created.

Affected products

pterodactyl wings: before 1.4.4 — fixed in 1.4.4

How to fix

Upgrade to a fixed version: pterodactyl wings 1.4.4. Check the vendor advisory for mitigations.

References

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