Improper Enforcement of a Single, Unique Action in PocketMine-MP - #VU161896
Published: November 8, 2026
Vulnerability identifier: #VU161896
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-837
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker with low privileges to increase PocketMine-MP server memory usage and amplify outbound network traffic.
The vulnerability exists due to improper enforcement of a single completion action during resource pack handling after the server sends ResourcePackStackPacket during login. A remote attacker with low privileges can batch multiple ResourcePackClientResponsePacket packets with STATUS_COMPLETED to repeatedly advance pre-spawn processing, creating multiple players for one session and duplicating large outbound packets.
Affected software
PocketMine-MP
Remediation
Install security update from vendor's website.
PocketMine-MP - update to 5.44.2