Bug 2437160 (CVE-2026-1301)

Summary: CVE-2026-1301 open62541: Out-of-bounds Write in o6 Automation GmbH Open62541
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: unspecifiedCC: pbrobinson
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A denial of service flaw has been discovered in Open62541. In builds with PubSub and JSON enabled, a crafted JSON message can cause the decoder to write beyond a heap-allocated array before authentication, reliably crashing the process and corrupting memory.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Bug Depends On: 2437443, 2437445    
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Description OSIDB Bzimport 2026-02-05 20:01:19 UTC
In builds with PubSub and JSON enabled, a crafted JSON message can cause the decoder to write beyond a heap-allocated array before authentication, reliably crashing the process and corrupting memory.

Comment 2 Peter Robinson 2026-04-20 18:22:23 UTC
Was only in the follow RC releases: Open62541 >=1.5-rc1|<1.5-rc2 (CVE-2026-1301)