CVE-2026-86198 PocketMine-MP before 5.44.2 Denial of Service via ResourcePackClientResponsePacket
Malicious clients can cause denial of service by sending repeated resource pack response packets, leading to excessive memory and network usage.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86198?
CVE-2026-86198 is a low-severity denial of service vulnerability in pmmp PocketMine-MP, published on 9 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-837
Which versions are affected by CVE-2026-86198?
2 open source packages ship an affected version, including pocketmine/pocketmine-mp.
| Package | Affected | Fixed in |
|---|---|---|
pocketmine/pocketmine-mp Packagist | All versions | 5.44.2 |
pocketmine/pocketmine-mp Packagist | All versions | 5.44.2 |
How do I fix CVE-2026-86198?
Upgrade pocketmine/pocketmine-mp to 5.44.2 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-86198 being exploited?
There is no known exploitation of CVE-2026-86198 in the wild and no public exploit code.
Sources
Also known as GHSA-hp34-98g7-38jv, GHSA-pg53-p7qp-65cv.