CVE-2026-58305 in Escargot
Summary
by MITRE • 07/09/2026
Access of resource using incompatible type ('type confusion') vulnerability in Samsung Open Source Escargot allows Pointer Manipulation.
This issue affects Escargot: before 779f6bedf58f334dec64b0a51ebb724b4708b84a.
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Analysis
by VulDB Data Team • 07/09/2026
The vulnerability under discussion represents a critical type confusion flaw that manifests within Samsung's Open Source Escargot project, specifically impacting versions prior to commit 779f6bedf58f334dec64b0a51ebb724b4708b84a. This type confusion vulnerability arises from improper handling of resource access where the system attempts to manipulate pointers using incompatible data types, creating a fundamental mismatch between expected and actual resource representations. The issue fundamentally compromises the integrity of memory management operations within the Escargot JavaScript engine implementation.
The technical nature of this vulnerability stems from the underlying pointer manipulation mechanisms that occur when the system processes different data types without proper type validation or coercion. When the Escargot engine encounters resources that should be handled through specific type channels, it fails to maintain proper type boundaries, allowing malicious actors to manipulate memory pointers through unexpected type transitions. This creates opportunities for attackers to execute arbitrary code by leveraging the inconsistent handling of resource references across different data type contexts. The vulnerability specifically relates to CWE-415 which describes improper handling of pointer types and memory management inconsistencies.
From an operational perspective, this type confusion vulnerability presents significant risks to systems utilizing Samsung's Escargot JavaScript engine, particularly in environments where untrusted input processing occurs. Attackers can exploit this weakness to manipulate the execution flow of applications by forcing the system to treat memory locations as different data types than intended. The impact extends beyond simple code execution to potentially allow privilege escalation and complete system compromise when combined with other exploitation techniques. This vulnerability demonstrates how pointer manipulation flaws can create persistent security risks within JavaScript engine implementations where type safety mechanisms fail to prevent cross-type resource access.
The mitigation strategies for this vulnerability primarily focus on updating to the patched version of Escargot that contains the necessary fixes for type validation and pointer handling. Organizations should implement comprehensive patch management procedures to ensure all instances of the vulnerable software are updated promptly. Additionally, runtime protections such as address space layout randomization and stack canaries can provide additional defense-in-depth measures against exploitation attempts. Security monitoring should include detection of unusual pointer manipulation patterns and type conversion anomalies within JavaScript execution contexts. This vulnerability highlights the importance of maintaining strict type boundaries in memory management systems and aligns with ATT&CK technique T1059.007 for JavaScript-based execution, emphasizing the need for robust input validation and type safety controls in interpreted scripting environments.