CVE-2026-88763: Skupper-router: skupper-router: unbounded recursion in amqp field parser leads to denial of service

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-10 · updated 2026-10-13
Weakness: CWE-674

Description

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.

Affected products

Red Hat Service Interconnect 2 for RHEL 8: all versions — fixed in 0:3.5.3-1.el8
Red Hat Service Interconnect 2 for RHEL 9: all versions — fixed in 0:3.5.3-1.el9, 3.5.3-1

How to fix

Upgrade to a fixed version: Red Hat Service Interconnect 2 for RHEL 8 0:3.5.3-1.el8; Red Hat Service Interconnect 2 for RHEL 9 0:3.5.3-1.el9, 3.5.3-1. Check the vendor advisory for mitigations.

References

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