GIVE YOUR AGENT THE EVIDENCE

Set up in your agent.

One prompt to get started. Paste it into your coding agent to connect cve.new through MCP and bring vulnerability context into your workflow.

Your agent needs remote MCP support and access to https://cve.new/mcp.

Read the setup guide

GIVE YOUR AGENT THE EVIDENCE

Investigate in your agent.

Turn this advisory into a focused investigation. Ask your agent to check your project’s versions, explain the evidence, and suggest a compatible fix.

Your agent needs remote MCP support and access to https://cve.new/mcp.

Read the setup guide

cve.new
Check your stack
GHSA-h87r-f4vc-mchvhigh7.5

PocketMine-MP vulnerable to improperly checked dropped item count leading to server crash

Impact

In 4.18.0, the network handling of inventories was completely revamped. Due to this, a bug was introduced which allowed players to request that the server drop more of an item than they had available in their hotbar.

Source excerpt · OSV

Affected packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

pocketmine/pocketmine-mp Packagist
Affected rangeRecorded fix
Earlier releases before 4.18.1Ecosystem versions4.18.1

Version evidence: OSV · GHSA-h87r-f4vc-mchv

View original version evidence (250 explicit versions)

Original source description

Impact

In 4.18.0, the network handling of inventories was completely revamped. Due to this, a bug was introduced which allowed players to request that the server drop more of an item than they had available in their hotbar.

This did not lead to any duplication issues, but instead led to a server crash, and is believed to have been exploited in the wild.

Patches

This was fixed in 58974765a68f63a9968a7ff3a06f584ff2ee08d2, which was released in 4.18.1.

Workarounds

Handle InventoryTransactionPacket in DataPacketReceiveEvent, and verify that the item count dropped isn't more than the available item count. However, it's complicated to do this, so it's not recommended.

References