# CVE-2022-51017: CVE-2022-51017

Status: published. Published: 2026-09-07. Updated: 2026-11-10.

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.

## Remediation

- fix: pocketmine/pocketmine-mp (Packagist): OSV reports a fixed version 3.26.5. Check the advisory for supported release branches. (source: OSV GHSA-c6fg-99pr-25m9) — https://github.com/advisories/GHSA-c6fg-99pr-25m9
- fix: pocketmine/pocketmine-mp (Packagist): OSV reports a fixed version 4.0.5. Check the advisory for supported release branches. (source: OSV GHSA-c6fg-99pr-25m9) — https://github.com/advisories/GHSA-c6fg-99pr-25m9

## Affected products and versions

-  / pocketmine/pocketmine-mp (pocketmine/pocketmine-mp): 3.0.0 (affected, Packagist); 3.0.1 (affected, Packagist); 3.0.10 (affected, Packagist); 3.0.11 (affected, Packagist); 3.0.12 (affected, Packagist); 3.0.2 (affected, Packagist); 3.0.3 (affected, Packagist); 3.0.4 (affected, Packagist); 3.0.5 (affected, Packagist); 3.0.6 (affected, Packagist); 3.0.7 (affected, Packagist); 3.0.8 (affected, Packagist); 3.0.9 (affected, Packagist); 3.1.0 (affected, Packagist); 3.1.1 (affected, Packagist); 3.1.2 (affected, Packagist); 3.1.3 (affected, Packagist); 3.1.4 (affected, Packagist); 3.1.5 (affected, Packagist); 3.1.6 (affected, Packagist); 3.1.7 (affected, Packagist); 3.1.8 (affected, Packagist); 3.10.0 (affected, Packagist); 3.10.1 (affected, Packagist); 3.11.0 (affected, Packagist); 3.11.1 (affected, Packagist); 3.11.2 (affected, Packagist); 3.11.3 (affected, Packagist); 3.11.4 (affected, Packagist); 3.11.5 (affected, Packagist); 3.11.6 (affected, Packagist); 3.11.7 (affected, Packagist); 3.12.0 (affected, Packagist); 3.12.1 (affected, Packagist); 3.12.2 (affected, Packagist); 3.12.3 (affected, Packagist); 3.12.4 (affected, Packagist); 3.12.5 (affected, Packagist); 3.12.6 (affected, Packagist); 3.13.0 (affected, Packagist); 3.13.1 (affected, Packagist); 3.14.0 (affected, Packagist); 3.14.1 (affected, Packagist); 3.14.2 (affected, Packagist); 3.14.3 (affected, Packagist); 3.15.0 (affected, Packagist); 3.15.1 (affected, Packagist); 3.15.2 (affected, Packagist); 3.15.3 (affected, Packagist); 3.15.4 (affected, Packagist); 3.16.0 (affected, Packagist); 3.16.1 (affected, Packagist); 3.17.0 (affected, Packagist); 3.17.1 (affected, Packagist); 3.17.2 (affected, Packagist); 3.17.3 (affected, Packagist); 3.17.4 (affected, Packagist); 3.17.5 (affected, Packagist); 3.17.6 (affected, Packagist); 3.17.7 (affected, Packagist); 3.18.0 (affected, Packagist); 3.18.1 (affected, Packagist); 3.18.2 (affected, Packagist); 3.19.0 (affected, Packagist); 3.19.1 (affected, Packagist); 3.19.2 (affected, Packagist); 3.19.3 (affected, Packagist); 3.2.0 (affected, Packagist); 3.2.1 (affected, Packagist); 3.2.2 (affected, Packagist); 3.2.3 (affected, Packagist); 3.2.4 (affected, Packagist); 3.2.5 (affected, Packagist); 3.2.6 (affected, Packagist); 3.2.7 (affected, Packagist); 3.20.0 (affected, Packagist); 3.21.0 (affected, Packagist); 3.21.1 (affected, Packagist); 3.22.0 (affected, Packagist); 3.22.1 (affected, Packagist); 3.22.2 (affected, Packagist); 3.22.3 (affected, Packagist); 3.22.4 (affected, Packagist); 3.22.5 (affected, Packagist); 3.23.0 (affected, Packagist); 3.23.1 (affected, Packagist); 3.24.0 (affected, Packagist); 3.25.0 (affected, Packagist); 3.25.1 (affected, Packagist); 3.25.2 (affected, Packagist); 3.25.3 (affected, Packagist); 3.25.4 (affected, Packagist); 3.25.5 (affected, Packagist); 3.25.6 (affected, Packagist); 3.26.0 (affected, Packagist); 3.26.1 (affected, Packagist); 3.26.2 (affected, Packagist); 3.26.3 (affected, Packagist); 3.26.4 (affected, Packagist); 3.3.0 (affected, Packagist); 3.3.1 (affected, Packagist); 3.3.2 (affected, Packagist); 3.3.3 (affected, Packagist); 3.3.4 (affected, Packagist); 3.4.0 (affected, Packagist); 3.4.1 (affected, Packagist); 3.4.2 (affected, Packagist); 3.4.3 (affected, Packagist); 3.5.0 (affected, Packagist); 3.5.1 (affected, Packagist); 3.5.10 (affected, Packagist); 3.5.11 (affected, Packagist); 3.5.12 (affected, Packagist); 3.5.13 (affected, Packagist); 3.5.2 (affected, Packagist); 3.5.3 (affected, Packagist); 3.5.4 (affected, Packagist); 3.5.5 (affected, Packagist); 3.5.6 (affected, Packagist); 3.5.7 (affected, Packagist); 3.5.8 (affected, Packagist); 3.5.9 (affected, Packagist); 3.6.0 (affected, Packagist); 3.6.1 (affected, Packagist); 3.6.2 (affected, Packagist); 3.6.3 (affected, Packagist); 3.6.4 (affected, Packagist); 3.6.5 (affected, Packagist); 3.6.6 (affected, Packagist); 3.7.0 (affected, Packagist); 3.7.1 (affected, Packagist); 3.7.2 (affected, Packagist); 3.7.3 (affected, Packagist); 3.8.0 (affected, Packagist); 3.8.1 (affected, Packagist); 3.8.2 (affected, Packagist); 3.8.3 (affected, Packagist); 3.8.4 (affected, Packagist); 3.8.5 (affected, Packagist); 3.8.6 (affected, Packagist); 3.8.7 (affected, Packagist); 3.9.0 (affected, Packagist); 3.9.1 (affected, Packagist); 3.9.2 (affected, Packagist); 3.9.3 (affected, Packagist); 3.9.4 (affected, Packagist); 3.9.5 (affected, Packagist); 3.9.6 (affected, Packagist); 3.9.7 (affected, Packagist); 3.9.8 (affected, Packagist); Ecosystem version events: introduced 0; fixed 3.26.5. Source: OSV GHSA-c6fg-99pr-25m9
-  / pocketmine/pocketmine-mp (pocketmine/pocketmine-mp): 4.0.0 (affected, Packagist); 4.0.1 (affected, Packagist); 4.0.2 (affected, Packagist); 4.0.3 (affected, Packagist); 4.0.4 (affected, Packagist); Ecosystem version events: introduced 4.0.0; fixed 4.0.5. Source: OSV GHSA-c6fg-99pr-25m9

## Severity and prioritization

- CVSS 4.0: 8.7 (high); 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X; source: NVD: disclosure@vulncheck.com

- CVSS 3.1: 7.5 (high); CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H; source: NVD: disclosure@vulncheck.com

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable yes; technical impact partial; source NVD SSVC: 134c704f-9b21-4f2e-91b3-4a467353bcc0

- Weaknesses: CWE-20

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/pmmp/PocketMine-MP/commit/6492cac5c10f9fa8443ceddd2191a7b65b73f601 (disclosure@vulncheck.com)

- https://github.com/pmmp/PocketMine-MP/commit/958a9dbf0fe3131ab60319c5a939f5dfbfe5dfbb (disclosure@vulncheck.com)

- https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-c6fg-99pr-25m9 (disclosure@vulncheck.com)

- https://www.vulncheck.com/advisories/pocketmine-mp-before-3.26.5-and-4.0.5-denial-of-service-via-skin-data (disclosure@vulncheck.com)

- https://github.com/advisories/GHSA-c6fg-99pr-25m9 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-c6fg-99pr-25m9 (OSV / GitHub Security Advisories; osv)

## Provenance

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-51017; retrieved 2026-11-10; source updated 2026-11-10

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-c6fg-99pr-25m9; retrieved 2026-11-10; source updated 2026-09-08

Revision: 22090294602ac0acfd3c71d5d014a776f6647cb0c9d663fe47d7ad2a747b68cc

Canonical: https://y2.dev/cve/CVE-2022-51017

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