CVE-2026-86200: Logging of Excessive Data

PocketMine-MP versions before 5.42.1 contain a denial of service vulnerability in the LoginPacket handler that allows remote attackers to flood warning messages by injecting numerous junk properties into the clientData JWT. Attackers can craft malicious login packets with excessive unknown...

PT-2026-89005

PocketMine-MP versions before 5.39.2 contain a network amplification vulnerability in ActorEventPacket handling that allows clients to trigger consuming animations for all visible players. Attackers can send crafted ActorEventPacket messages to spam animation events to other clients and waste...

CVE-2026-86201: Uncontrolled Resource Consumption

PocketMine-MP before 5.41.1 contains a denial of service vulnerability in LoginPacket processing where large or complex structures in unknown clientData JWT properties cause excessive logging without sanitization. Attackers can send crafted LoginPackets with deeply nested or massive object...

CVE-2026-86198: Improper Enforcement of a Single, Unique Action

PocketMine-MP versions before 5.44.2 fail to properly validate multiple ResourcePackClientResponsePacket packets with STATUSCOMPLETED status during resource pack handling. Malicious clients can send batches of these packets to repeatedly trigger pre-spawn progression, creating duplicate Player...

PT-2026-89001

PocketMine-MP versions before 5.44.2 fail to properly validate multiple ResourcePackClientResponsePacket packets with STATUS COMPLETED status during resource pack handling. Malicious clients can send batches of these packets to repeatedly trigger pre-spawn progression, creating duplicate Player...

CVE-2026-86203: Improper Control of a Resource Through its Lifetime

PocketMine-MP versions before 5.39.2 fail to validate entity despawn state when processing attack packets from clients. Attackers can exploit a race condition by attacking a disconnecting player to trigger multiple death handlers, causing inventory items and experience to drop multiple times for...

CVE-2022-51012

PocketMine-MP versions before 4.2.9 fail to properly validate NBT data types during deserialization of inventory transaction packets from clients. Attackers can send crafted inventory transactions with malformed NBT tags to trigger server crashes and cause denial of service...

CVE-2022-51017

PocketMine-MP versions before 3.26.5 and 4.0.5 fail to validate the length of skin data fields submitted by players, allowing uncapped values to exceed the 32767 byte TAGString limit. Attackers can submit oversized skin data fields like skinID or geometryName to trigger exceptions during NBT data...

CVE-2022-51018

PocketMine-MP before 3.26.5 and 4.0.x before 4.0.5 does not limit book page text length, page count, or author/title length. A player who obtains a writable book can create oversized NBT 'book bombs', causing excess bandwidth consumption and server crashes exceeding the 1 MB chunk size limit when...

CVE-2022-51013

PocketMine-MP versions before 4.2.3 fail to validate damage metadata values in tool and armor item NBT data received from clients. Attackers can send negative or out-of-range damage values in itemstack NBT to trigger unhandled exceptions in the Durable class, causing server crashes...

CVE-2022-51014

PocketMine-MP before 4.0.7 contains an unhandled exception vulnerability in the ModalFormResponsePacket handler when processing malformed JSON from clients. Attackers can send specially crafted form response packets with invalid JSON to trigger an uncaught InvalidArgumentException, causing server...

CVE-2022-51015

PocketMine-MP before 4.0.6 does not validate facing values in PlayerActionPacket for STARTBREAK and CRACKBREAK actions or in UseItemTransactionData typically within InventoryTransactionPacket. A remote authenticated attacker can send crafted packets with invalid facing values e.g., negative or...

CVE-2022-51016

PocketMine-MP 3.x before 3.27.0 does not implement Minecraft Bedrock protocol encryption, so the server cannot verify that a connecting client possesses the private key corresponding to its login token. An attacker who captures a valid login from another player's session for example by tricking t...

CVE-2022-51011

PocketMine-MP before 4.2.10 fails to validate the total length of incoming chat message blobs before splitting them by newline characters, allowing attackers to send large messages containing many newlines. Malicious clients can send megabyte-sized chat packets and bombard the server with thousan...

CVE-2022-51010

PocketMine-MP versions before 4.4.2 fail to properly validate item IDs received from clients in itemstack NBT data. Attackers can send crafted item IDs outside the valid range to trigger an uncaught exception that crashes the server...

CVE-2022-51018 PocketMine-MP before 3.26.5 and 4.0.5 Input Validation via Book Pages

PocketMine-MP before 3.26.5 and 4.0.x before 4.0.5 does not limit book page text length, page count, or author/title length. A player who obtains a writable book can create oversized NBT 'book bombs', causing excess bandwidth consumption and server crashes exceeding the 1 MB chunk size limit when...

EUVD-2022-56047

PocketMine-MP before 3.26.5 and 4.0.x before 4.0.5 does not limit book page text length, page count, or author/title length. A player who obtains a writable book can create oversized NBT 'book bombs', causing excess bandwidth consumption and server crashes exceeding the 1 MB chunk size limit when...

CVE-2022-51018 PocketMine-MP before 3.26.5 and 4.0.5 Input Validation via Book Pages

PocketMine-MP before 3.26.5 and 4.0.x before 4.0.5 does not limit book page text length, page count, or author/title length. A player who obtains a writable book can create oversized NBT 'book bombs', causing excess bandwidth consumption and server crashes exceeding the 1 MB chunk size limit when...

CVE-2022-51018 PocketMine-MP before 3.26.5 and 4.0.5 Input Validation via Book Pages

PocketMine-MP before 3.26.5 and 4.0.x before 4.0.5 does not limit book page text length, page count, or author/title length. A player who obtains a writable book can create oversized NBT 'book bombs', causing excess bandwidth consumption and server crashes exceeding the 1 MB chunk size limit when...

CVE-2022-51018

PocketMine-MP versions before 3.26.5 and 4.0.x before 4.0.5 lack input validation on book item NBT fields (page text length, page count, author/title length). A player with a writable book can craft oversized NBT payloads ("book bombs"), causing excess bandwidth consumption and server crashes by ...