CVE-2026-120386 in Effekseer
Summary
by MITRE • 11/09/2026
Effekseer improperly validates "effect" files. When a crafted effect file is loaded to the affected runtime, the host process may be forced to crash.
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Analysis
by VulDB Data Team • 11/09/2026
The vulnerability in Effekseer stems from an insufficient validation mechanism applied when processing external effect files within its rendering engine. Effect files are critical configuration assets that define particle systems and visual effects for games and interactive applications. When a maliciously crafted file is loaded into the affected runtime environment, the application fails to adequately verify the integrity or bounds of data structures contained within the file. This lack of rigorous input validation allows malformed content to bypass internal checks, leading directly to memory corruption issues such as buffer overflows or out-of-bounds reads during the parsing and initialization phases of the effect loading process.
From a technical perspective, this flaw represents a classic instance of improper input handling where the software assumes that incoming data adheres to expected formats without performing necessary sanity checks on array indices, string lengths, or memory allocation sizes. The runtime environment attempts to allocate resources based on untrusted values extracted from the file header or metadata sections. If these values are manipulated by an attacker to exceed allocated buffer limits or reference invalid memory addresses, the operating system's memory protection mechanisms intervene abruptly. This intervention results in a segmentation fault or access violation, causing the host process to terminate unexpectedly and crash rather than handling the error gracefully through exception handling routines.
The operational impact of this vulnerability is primarily characterized by denial of service against applications utilizing Effekseer for visual effects rendering. For end-users playing games that integrate this library, encountering such a crafted file can lead to immediate application crashes, resulting in data loss if unsaved progress exists and disrupting the user experience significantly. In server-side scenarios where effect files might be dynamically loaded or processed as part of asset pipelines, an attacker could potentially exploit this flaw to disrupt service availability by triggering repeated crashes through automated requests containing malicious payloads. While direct code execution is not explicitly confirmed in the brief description, memory corruption vulnerabilities often serve as precursors to more severe exploits if additional conditions are met during subsequent operations on corrupted data structures.
This vulnerability aligns with Common Weakness Enumeration category CWE-20 Improper Input Validation and potentially CWE-119 Memory Buffer Corruption depending on the specific nature of the crash mechanism. In terms of tactical mapping, it falls under ATT&CK technique T1496 Resource Hijacking or more specifically denial-of-service vectors where availability is compromised through application instability. Mitigation strategies should focus on implementing strict schema validation for all incoming effect files before they are processed by the core engine logic. Developers must enforce bounds checking on all array accesses and string operations derived from external inputs, ensuring that memory allocations do not exceed predefined safe limits. Additionally, deploying fuzzing tools during the development lifecycle can help identify edge cases in file parsing routines, while runtime protection mechanisms such as Address Space Layout Randomization (ASLR) and Data Execution Prevention (DEP) provide essential layers of defense to mitigate exploitation attempts even if validation fails.