Bug 2487704 (CVE-2026-10142)

Summary: CVE-2026-10142 kafka-python: kafka-python: Denial of Service due to crafted frame length in protocol parser
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: adudiak, bdettelb, doconnor, kaycoth, kshier, stcannon, teagle, yguenane
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in kafka-python. A malicious broker or a machine-in-the-middle attacker can exploit a denial-of-service vulnerability in the protocol parser. By sending a specially crafted 4-byte frame length value without proper bounds validation, an attacker can trigger excessive memory allocation or cause connections to hang. This can lead to unresponsive requests and consumers failing to heartbeat, resulting in a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-06-10 21:01:34 UTC 
kafka-python prior to 2.3.2 contains a denial-of-service vulnerability in the protocol parser that allows a malicious broker or machine-in-the-middle attacker to exhaust memory or hang connections by sending a crafted 4-byte frame length value without bounds validation. Attackers can send a specially crafted frame length through the receive_bytes() function to trigger either a multi-gigabyte memory allocation or an uncaught ValueError that leaves the connection in a broken state, causing requests to hang and consumers to stop heartbeating until restart.