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
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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Python (PyPI) | kafka-python | < 2.3.2 | 2.3.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-10142
- https://github.com/dpkp/kafka-python/pull/3019
- https://github.com/dpkp/kafka-python/pull/3026
- https://github.com/dpkp/kafka-python/commit/6e4831444f972d169cdd11f5c8d50333cea3f19b
- https://github.com/dpkp/kafka-python/commit/9f92d0f53ecfee738c54638867c3d67f83017bca
- https://github.com/dpkp/kafka-python
- https://github.com/dpkp/kafka-python/releases/tag/2.3.2
- https://github.com/pypa/advisory-database/tree/main/vulns/kafka-python/PYSEC-2026-2190.yaml
- https://www.vulncheck.com/advisories/kafka-python-prior-to-denial-of-service-via-protocol-parser-frame-length
- https://github.com/advisories/GHSA-m3px-q5gj-j9x7
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X- Weakness (CWE)
CWE-789- Platform
- Python (PyPI)
- Package
kafka-python- Disclosed
- 10.06.2026
- Updated
- 11.10.2026 15:18
Sources and licenses
OSV / GitHub Advisory Database - GHSA-m3px-q5gj-j9x7 - CC BY 4.0
OSV / GitHub Advisory Database - PYSEC-2026-2190 - PyPA Advisory Database; CC BY 4.0
Vulnerability history: kafka-python
All published vulnerabilities of this package (Python (PyPI)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 06.2026 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 2
Disclosures per year
- 2026: 2
-
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 this entry
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