High severity · published Sep 7, 2026
CVE-2022-51017
PocketMine-MP before 3.26.5 and 4.0.5 Denial of Service via Skin Data
7.5
CVSS
0.6%
EPSS
No
On KEV
Description
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 TAG_String limit. Attackers can submit oversized skin data fields like skinID or geometryName to trigger exceptions during NBT data serialization, causing server crashes.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PO
PocketMine-MP · pmmp
3.0.0 before 3.26.5; 4.0.0 before 4.0.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2022-51017
CVE.org
https://www.cve.org/CVERecord?id=CVE-2022-51017
vendor-advisory
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-c6fg-99pr-25m9
patch
https://github.com/pmmp/PocketMine-MP/commit/958a9dbf0fe3131ab60319c5a939f5dfbfe5dfbb
patch
https://github.com/pmmp/PocketMine-MP/commit/6492cac5c10f9fa8443ceddd2191a7b65b73f601
third-party-advisory
https://www.vulncheck.com/advisories/pocketmine-mp-before-3.26.5-and-4.0.5-denial-of-service-via-skin-data
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