Bug 2531301 (CVE-2026-88763)

Summary: CVE-2026-88763 skupper-router: skupper-router: Unbounded recursion in AMQP field parser leads to denial of service
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: ansmith, jbritton, pjindal, security-response-team
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the skupper-router component of Red Hat Service Interconnect, which is used to provide secure communication between distributed services. The issue occurs when the router processes a specially crafted network message using its AMQP field parser. Due to a lack of bounds on recursion during parsing, the router can run out of stack memory and crash, leading to a denial of service for the interconnected network.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-09-10 06:55:50 UTC 
A denial-of-service vulnerability was discovered in skupper-router within the AMQP field parser. The flaw is caused by unbounded recursion when processing deeply nested or specially crafted AMQP messages, leading to a stack overflow. An attacker who can send messages to the router can trigger this crash. Exploitation requires the attacker to possess a valid x.509 certificate signed by the Red Hat Service Interconnect network's certificate authority. Successful exploitation results in the skupper-router process crashing, terminating all active connections and preventing new traffic from being routed through the affected node.