CyberSecBulletin

Improper Handling of Syntactically Invalid Structure

CWE-228

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

We track 9 vulnerabilities of this type. 100% are rated high or critical, and the average CVSS score is 8.3.

Latest Improper Handling of Syntactically Invalid Structure vulnerabilities

  • 10.0 Critical severity

    mistral-vibe: Improper Handling of Syntactically Invalid Structure

    CVE-2026-87986Mistralai

    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 us

  • 7.5 High severity

    Pro Cloud Server: Improper Handling of Syntactically Invalid Structure

    CVE-2026-42100Sparx Systems

    Improper Handling of Syntactically Invalid Structure in Sparx Pro Cloud Server allows Denial of Service (DoS) attack to be executed by sending an specially crafted SQL query. This causes the Pro Cloud Server service to terminate unexpectedly. The vendor was no

  • 7.5 High severity

    firebird: Improper Handling of Syntactically Invalid Structure

    CVE-2026-34232FirebirdSQL

    Firebird is an open-source relational database management system. In versions prior to 5.0.4, 4.0.7 and 3.0.14, the xdr_status_vector() function does not handle the isc_arg_cstring type when decoding an op_response packet, causing a server crash when one is en

  • 7.7 High severity

    IOS: Improper Handling of Syntactically Invalid Structure

    CVE-2026-20125Cisco

    A vulnerability in the HTTP Server feature of Cisco IOS Software and Cisco IOS XE Software Release 3E could allow an authenticated, remote attacker to cause an affected device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulne

  • 9.8 Critical severity

    FortiWeb: Improper Handling of Syntactically Invalid Structure

    CVE-2024-55594Fortinet

    An improper handling of syntactically invalid structure in Fortinet FortiWeb at least vesrions 7.4.0 through 7.4.6 and 7.2.0 through 7.2.10 and 7.0.0 through 7.0.10 allows attacker to execute unauthorized code or commands via HTTP/S crafted requests.

  • 9.8 Critical severity

    FortiWeb: Improper Handling of Syntactically Invalid Structure

    CVE-2023-42784Fortinet

    An improper handling of syntactically invalid structure in Fortinet FortiWeb at least verions 7.4.0 through 7.4.6 and 7.2.0 through 7.2.10 and 7.0.0 through 7.0.10 allows attacker to execute unauthorized code or commands via HTTP/S crafted requests.

  • 7.5 High severity

    Swift ASN1: Improper Handling of Syntactically Invalid Structure

    CVE-2025-0343Swift Project

    Swift ASN.1 can be caused to crash when parsing certain BER/DER constructions. This crash is caused by a confusion in the ASN.1 library itself which assumes that certain objects can only be provided in either constructed or primitive forms, and will trigger a

  • 7.5 High severity

    MongoDB Rust Driver: Improper Handling of Syntactically Invalid Structure

    CVE-2024-6382MongoDB

    Incorrect handling of certain string inputs may result in MongoDB Rust driver constructing unintended server commands. This may cause unexpected application behavior including data modification. This issue affects MongoDB Rust Driver 2.0 versions prior to 2.8.

  • 7.5 High severity

    Junos OS Evolved: Improper Handling of Syntactically Invalid Structure

    CVE-2024-21612Juniper Networks

    An Improper Handling of Syntactically Invalid Structure vulnerability in Object Flooding Protocol (OFP) service of Juniper Networks Junos OS Evolved allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). On all Junos OS Evolved p