CWE-228Class

Improper Handling of Syntactically Invalid Structure

Incomplete in the CWE catalog · 19 CVEs mapped

19
CVEs mapped
6.5
Median CVSS
What it is

The product does not handle or incorrectly handles input that is not syntactically well-formed with respect to the associated specification.

Recent examples
5.9cvss
CVE-2026-107299

CVE-2026-107299 - MEDIUM Severity Vulnerability

msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the streaming decoder treats the reserved MessagePack byte 0xc1 as incomplete input instead of invalid input. When 0xc1 begins a stream, subsequent data remains buffered while the decoder waits for bytes that cannot make the value valid, allowing a remote peer to exhaust memory. This issue is fixed in version 6.1.0.

MEDIUMno explanation yet
0%
epss
—none
CVE-2026-87986

CVE-2026-87986 - UNKNOWN Severity Vulnerability

An arbitrary code execution vulnerability in Mistral Vibe allows an attacker to bypass command permission checks using shell constructs it's parser cannot interpret. Unparsed portions are omitted from inspection, enabling embedded commands to execute on the user's system without approval.

no explanation yet
1%
epss
7.1cvss
CVE-2026-50103

Improper Handling of Syntactically Invalid Structure in MZ Automation libIEC61850

A NULL pointer dereference in the L2 GOOSE and R-GOOSE shared parser, which may allow a network-adjacent attacker to crash a subscribing application by sending a crafted GOOSE frame containing a malformed TLV value.

HIGHno explanation yet
0%
epss
The record
Technical detail
CWE ID
CWE-228
Abstraction
Class
Structure
Simple
Status
Incomplete