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Description

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.

PUBLISHED Reserved 2026-05-29 | Published 2026-06-10 | Updated 2026-06-10 | Assigner VulnCheck




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

HIGH: 8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-789 Memory Allocation with Excessive Size Value

Product status

Default status
unknown

Any version before 2.3.2
affected

Credits

Katriel Moses finder

References

www.vulncheck.com/...ervice-via-protocol-parser-frame-length technical-description third-party-advisory

github.com/dpkp/kafka-python/pull/3019

github.com/dpkp/kafka-python/pull/3026

github.com/...ommit/6e4831444f972d169cdd11f5c8d50333cea3f19b patch

cve.org (CVE-2026-10142)

nvd.nist.gov (CVE-2026-10142)

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