Bug 2453477 (CVE-2026-5190)

Summary: CVE-2026-5190 aws-c-event-stream: aws-c-event-stream: Arbitrary code execution via crafted event-stream messages
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2454379, 2454380    
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Description OSIDB Bzimport 2026-03-31 18:02:57 UTC
Out-of-bounds write in the streaming decoder component in aws-c-event-stream before 0.6.0 might allow a third party operating a server to cause memory corruption leading to arbitrary code execution on a client application that processes crafted event-stream messages.

To remediate this issue, users should upgrade to version 0.6.0 or later.