CVE-2023-54355

High

Description

PocketMine-MP versions before 5.3.1 and 4.23.1 fail to validate that the identityPublicKey in LoginPacket uses the required secp384r1 elliptic curve. Attackers can provide LoginPackets with keys using different curves or non-EC key types to pass login verification but trigger an uncaught exception during ECDH key derivation, crashing the server.

SeverityHigh

CVSS7.5

Exploit probability33. percentile0.4%

ProductPocketmine/pocketmine-mp

PublishedSep 9, 2026

First seenSep 9, 2026

Weakness typeCWE-347CWE-347

How to fix

Update

pocketmine/pocketmine-mp5.3.1 or later

Patches

github.com/pmmp/PocketMine-MP/commit/4e646d19a4a1e0d082bd4d1f5a58ae0182a268d9

Vendor advisories

github.com/pmmp/PocketMine-MP/security/advisories/GHSA-79rc-jjh6-rc89

Affected products

Product	Affected versions	Fixed in
pocketmine/pocketmine-mpPackagist	5.2.0 ≤ v < 5.3.1	5.3.1

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