CVE-2026-59940
Description
A flaw was found in Seroval, a JavaScript (JS) value stringification library. The seroval.fromJSON() function allows a remote attacker to provide specially crafted JSON Promise control nodes. These nodes can operate on deserialized values without proper verification, leading to unintended server-side invocation or remote code execution, especially when plugins are enabled.
Statement
Red Hat Product Security has determined that this vulnerability does not affect any currently supported Red Hat product. This assessment may evolve based on further analysis and discovery. For more information about this vulnerability and the products it affects, please see the linked references.
Understanding the Weakness (CWE)
Availability,Integrity,Confidentiality
Technical Impact: Read Memory; Modify Memory; Execute Unauthorized Code or Commands; DoS: Crash, Exit, or Restart
When a memory buffer is accessed using the wrong type, it could read or write memory out of the bounds of the buffer, if the allocated buffer is smaller than the type that the code is attempting to access, leading to a crash and possibly code execution.
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