CVE-2026-86203 json
PocketMine-MP before 5.39.2 Item Duplication via Despawn State
published 7mo ago modified last mo. also GHSA-f9jp-856v-8642 , EUVD-2026-74914
- cvss
- 3.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 28%
- public exploits
- 0
- none known
Summary
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 duplication.
Patch / fix
- packagist pocketmine/pocketmine-mp 5.39.2
- pmmp PocketMine-MP 5.39.2
Is CVE-2026-86203 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/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 |
| GitHub | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | pocketmine/pocketmine-mp | <5.39.2 |
5.39.2 |
Affected products
- pmmp PocketMine-MP
Classification
- Weakness
-
- CWE-664 Improper Control of a Resource Through its Lifetime
References
-
github.com
/pmmp/PocketMine-MP/commit/c0719b76b18f2508143134e79bc9f1aa39109683
patch, web
-
github.com
/pmmp/PocketMine-MP/security/advisories/GHSA-f9jp-856v-8642
vendor-advisory, web
-
vulncheck.com
/advisories/pocketmine-mp-before-5.39.2-item-duplication-via-despawn-state
third-party-advisory
-
github.com
/pmmp/PocketMine-MP
package
Sources
- CVE List CVE-2026-86203
- GitHub Advisory GHSA-f9jp-856v-8642
- NVD CVE-2026-86203
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.