What is CVE-2026-86198?

CVE-2026-86198 is a medium-severity vulnerability in Pmmp Pocketmine-Mp, classified under CWE-837. CVSS score: 4.2/10. Published 2026-09-09.

How severe is CVE-2026-86198?

Medium severity. CVSS v3 base score is 4.2 out of 10.

Vulnerability in Pmmp Pocketmine-Mp

CVE-2026-86198

PocketMine-MP versions before 5.44.2 fail to properly validate multiple ResourcePackClientResponsePacket packets with STATUS_COMPLETED status during resource pack handling. Malicious clients can send batches of these packets to repeatedly trigger pre-spawn progression, creating duplicate Player objects and amplifying memory consumption and network traffic.

Published 2026-09-09 · last modified 2026-09-10.

CVSS v3 metric

CVSS v3 base score 4.2 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.004 (31.0th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Pmmp Pocketmine-Mp

Weakness classification (CWE)

CWE-837

References

github.com/pmmp/PocketMine-MP/security/advisories/GHSA-pg53-p7qp-65cv (vendor-advisory)
github.com/pmmp/PocketMine-MP/commit/7a27894146a04964ab628ed9033140fdbf887ff3 (patch)
www.vulncheck.com/advisories/pocketmine-mp-before-5.44.2-denial-of-service-via-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-86198?: CVE-2026-86198 is a medium-severity vulnerability in Pmmp Pocketmine-Mp, classified under CWE-837. CVSS score: 4.2/10. Published 2026-09-09.
How severe is CVE-2026-86198?: Medium severity. CVSS v3 base score is 4.2 out of 10.