Improper input validation in PocketMine-MP - #VU125427
Published: April 8, 2026
Vulnerability identifier: #VU125427
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in STATUS_SEND_PACKS handling of ResourcePackClientResponsePacket when processing the packIds array from client packets. A remote attacker can send a specially crafted packet containing duplicate valid pack UUIDs to cause a denial of service.
Only servers with resource packs enabled are vulnerable.
Affected software
PocketMine-MP
Remediation
Install security update from vendor's website.
PocketMine-MP - update to 5.32.1