CVE-2020-37277

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-06. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 6, 2026

Last Modified

September 8, 2026

Advisory Details (3)

Auto-updated Sep 6, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
generic

PocketMine-MP before 3.15.4 Denial of Service via InventoryTransaction | Advisories | VulnCheck

https://www.vulncheck.com/advisories/pocketmine-mp-before-3.15.4-denial-of-service-via-inventorytransaction
github_commit

commit c368ebb5e746 (pmmp/PocketMine-MP)

Fix landed in pmmp/PocketMine-MP commit c368ebb5e746 — awaiting tagged release

https://github.com/pmmp/PocketMine-MP/commit/c368ebb5e74632bc622534b37cd1447b97281e20
github Patch Available🟡 PoC Available

Exploitable inventory component chaining in versions < 3.15.4 · Advisory · pmmp/PocketMine-MP · GitHub

https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-8jq6-w5cg-wm45

Vendor Advisories for CVE-2020-37277(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
Packagist(1)
PackageVulnerable rangeFixed inDependents
pocketmine/pocketmine-mp3.0.0 ... 3.9.8 (108 versions)3.15.4—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 18× in last 7d / 40× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-18 19:23 UTCEPSS rescore
  2. 2026-09-18 15:08 UTCEG score recompute
  3. 2026-09-18 15:08 UTCGHSA enrichment
  4. 2026-09-17 19:22 UTCEPSS rescore
  5. 2026-09-17 15:39 UTCGHSA enrichment
  6. 2026-09-16 16:09 UTCEG score recompute
  7. 2026-09-16 16:09 UTCGHSA enrichment
  8. 2026-09-16 14:04 UTCEPSS rescore
  9. 2026-09-15 16:40 UTCEG score recompute
  10. 2026-09-15 16:40 UTCGHSA enrichment
  11. 2026-09-15 03:06 UTCEPSS rescore
  12. 2026-09-14 17:11 UTCGHSA enrichment
  13. 2026-09-13 17:42 UTCEG score recompute
  14. 2026-09-13 17:42 UTCGHSA enrichment
  15. 2026-09-13 16:43 UTCEPSS rescore
  16. 2026-09-12 18:12 UTCEG score recompute
  17. 2026-09-12 18:12 UTCGHSA enrichment
  18. 2026-09-12 14:57 UTCEPSS rescore
  19. 2026-09-11 18:43 UTCEG score recompute
  20. 2026-09-11 18:43 UTCGHSA enrichment
  21. 2026-09-11 09:32 UTCEPSS rescore
  22. 2026-09-10 19:13 UTCEG score recompute
  23. 2026-09-10 19:13 UTCGHSA enrichment
  24. 2026-09-09 19:43 UTCEG score recompute
  25. 2026-09-09 19:43 UTCGHSA enrichment
Show 15 more
  1. 2026-09-08 21:56 UTCEPSS rescore
  2. 2026-09-08 20:13 UTCGHSA enrichment
  3. 2026-09-08 15:11 UTCEG score recompute
  4. 2026-09-08 15:11 UTCGHSA enrichment
  5. 2026-09-08 14:14 UTCEG score recompute
  6. 2026-09-08 14:13 UTCGHSA enrichment
  7. 2026-09-07 15:57 UTCEPSS rescore
  8. 2026-09-07 14:07 UTCGHSA enrichment
  9. 2026-09-06 13:24 UTCEG score recompute
  10. 2026-09-06 13:24 UTCGHSA enrichment
  11. 2026-09-06 12:59 UTCEG score recompute
  12. 2026-09-06 12:59 UTCGHSA enrichment
  13. 2026-09-06 12:22 UTCEG score recompute
  14. 2026-09-06 12:13 UTCEG score recompute
  15. 2026-09-06 12:09 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2020-37277?
CVE-2020-37277 is a medium vulnerability published on September 6, 2026. 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,…
When was CVE-2020-37277 disclosed?
CVE-2020-37277 was first published in the National Vulnerability Database on September 6, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2020-37277 actively exploited?
CVE-2020-37277 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.6% of all scored CVEs.
What is the CVSS score of CVE-2020-37277?
CVE-2020-37277 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2020-37277?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-37277, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2020-37277

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