Allocation of Resources Without Limits or Throttling Affecting pocketmine/pocketmine-mp package, versions <5.39.2
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-PHP-POCKETMINEPOCKETMINEMP-15920407
- published7 Apr 2026
- disclosed6 Apr 2026
- creditZwuiix-cmd
Introduced: 6 Apr 2026
CVE-2026-86204 (opens in a new tab)How to fix?
Upgrade pocketmine/pocketmine-mp to version 5.39.2 or higher.
Overview
pocketmine/pocketmine-mp is a highly customisable, open source server software for Minecraft: Bedrock Edition written in PHP
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the ModalFormResponsePacket handling process. An attacker can exhaust server memory and CPU resources by sending a massive JSON payload in the formData field, causing the server to freeze or become unresponsive. This is only exploitable if the attacker has an active session and is spawned in the game world.
Workaround
This vulnerability can be mitigated by using a plugin to check the maximum size of the formData field and ensure the form ID is not repeated via DataPacketReceiveEvent. However, a complete workaround requires reflection to access the Player->forms property, which is not available via the public API prior to version 5.39.2.