CVE-2026-5190
Description
A flaw was found in aws-c-event-stream. A third party operating a server can exploit an out-of-bounds write vulnerability in the streaming decoder component. By sending specially crafted event-stream messages, the server can cause memory corruption on a client application, potentially leading to arbitrary code execution.
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.
Mitigation
Client applications utilizing `aws-c-event-stream` should avoid connecting to untrusted servers. Implement network segmentation or firewall rules to restrict client access to known, trusted endpoints. Consider sandboxing client applications that process event-stream messages from external sources to limit potential impact.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
Frequently Asked Questions
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