Godot Engine version All versions prior to 2.1.5, all 3.0 versions prior to 3.0.6.

published 2018-08-20 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-1894

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.8%; EPSS 3.8% chance of exploitation in 30 days, percentile 90%
public exploits: 0; none known

Godot Engine version All versions prior to 2.1.5, all 3.0 versions prior to 3.0.6. contains a Signed/unsigned comparison, wrong buffer size chackes, integer overflow, missing padding initialization vulnerability in (De)Serialization functions (core/io/marshalls.cpp) that can result in DoS (packet of death), possible leak of uninitialized memory. This attack appear to be exploitable via A malformed packet is received over the network by a Godot application that uses built-in serialization (e.g. game server, or game client). Could be triggered by multiplayer opponent. This vulnerability appears to have been fixed in 2.1.5, 3.0.6, master branch after commit feaf03421dda0213382b51aff07bd5a96b29487b.

Patch / fix

fixed in 1 links 1

godotengine godot 2.1.5, 3.0.6

github.com/godotengine/godot/issues/20558 advisory

Exploit prediction

3.79% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/godotengine/godot/issues/20558 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-131 Incorrect Calculation of Buffer Size
CWE-190 Integer Overflow or Wraparound
CWE-681 Incorrect Conversion between Numeric Types
CWE-908 Use of Uninitialized Resource
CWE-909 Missing Initialization of Resource

References

github.com /godotengine/godot/issues/20558
exploit, issue-tracking, patch, third-party-advisory
godotengine.org /article/maintenance-release-godot-2-1-5
vendor-advisory
godotengine.org /article/maintenance-release-godot-3-0-6
vendor-advisory

Sources

CVE List CVE-2018-1000224
NVD CVE-2018-1000224

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary