High severity · published Sep 9, 2026
CVE-2023-54355
PocketMine-MP 5.2.0 Server Crash via Incorrect EC Curve
7.5
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PO
PocketMine-MP · pmmp
before 4.23.1; 5.2.0 before 5.3.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-54355
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-54355
vendor-advisory
https://github.com/pmmp/PocketMine-MP/security/advisories/GHSA-79rc-jjh6-rc89
patch
https://github.com/pmmp/PocketMine-MP/commit/4e646d19a4a1e0d082bd4d1f5a58ae0182a268d9
third-party-advisory
https://www.vulncheck.com/advisories/pocketmine-mp-5.2.0-server-crash-via-incorrect-ec-curve
More from PocketMine-MP
7.5
CVE-2026-86201
PocketMine-MP before 5.41.1 LogDoS via LoginPacket clientData
7.5
CVE-2026-86199
PocketMine-MP before 5.43.1 Denial of Service via unauthenticated login
7.5
CVE-2024-58381
PocketMine-MP before 5.11.1 Denial of Service via LoginPacket
7.5
CVE-2023-54393
PocketMine-MP before 4.20.5 Denial of Service via LoginPacket
7.5
CVE-2023-54390
PocketMine-MP before 5.3.1 Denial of Service via LoginPacket