CVE catalog

CVE-2026-10143

Severity: High · CVSS 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/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
Published: Jun 10, 2026, 8:22:39 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.52% · Oct 25, 2026

kafka-python prior to 2.3.2 contains a denial-of-service vulnerability in SCRAM authentication handling that allows a malicious or machine-in-the-middle broker to freeze the client event loop by supplying an excessively large iteration count. In scram.py, ScramClient.process_server_first_message() passes the broker-controlled SCRAM iteration count directly to hashlib.pbkdf2_hmac() without validation, blocking producer sends, consumer polls, admin operations, and heartbeats, which can cause consumer group eviction and repeated reconnect failures.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	python-kafka	sid	`2.2.3-1`	fixed
Debian	python-kafka	forky	`2.2.3-1`	fixed
Debian	python-kafka	trixie	`2.0.2-9`	vulnerable
Debian	python-kafka	bookworm	`2.0.2-3`	vulnerable
Cpe	python-kafka	Not reported	Not reported	vulnerable
Cpe	kafka-python	Not reported	`2.3.2`	fixed
Cpe	kafka-python	Not reported	`2.3.2`	fixed
Pip	kafka-python	Not reported	`2.3.2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	python-kafka	source	sid	`2.0.2-12`	not yet assigned	Not reported	[1139822]
Debian	python-kafka	source	forky	`2.0.2-12`	not yet assigned	Not reported	[1139822]
Debian	python-kafka	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1139822]
Debian	python-kafka	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1139822]
Cpe	kafka-python	cpe	Not reported	`2.3.2`	Not reported	Not reported	Not reported
Cpe	kafka-python	cpe	Not reported	`2.3.2`	Not reported	NVD-CVE-2026-10143	Not reported
Pip	kafka-python	pip	Not reported	`2.3.2`	Not reported	GHSA-2JCM-HQ8R-84WX	Not reported

[Debian bug #1139822]

Notes

[trixie] python-kafka: Minor issue [bookworm] python-kafka: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-kafka]Affected
Source package: [python-kafka]
Details (2)
- 2.0.2-3 · all · bookworm
  Affected
  nvd · python-kafka · debian · bookworm; nvd · python-kafka · debian · 12
- 2.0.2-3 · all · bookworm
  Affected
  nvd · python-kafka · debian · bookworm; nvd · python-kafka · debian · 12
[python-kafka-doc]Affected
Source package: [python-kafka]
Details (2)
- 2.0.2-3 · all · bookworm
  Affected
  nvd · python-kafka · debian · bookworm; nvd · python-kafka · debian · 12
- 2.0.2-3 · all · bookworm
  Affected
  nvd · python-kafka · debian · bookworm; nvd · python-kafka · debian · 12

[Debian 13 (Trixie)]

[python3-kafka]Affected
Source package: [python-kafka]
Details (2)
- 2.0.2-9 · all · trixie
  Affected
  nvd · python-kafka · debian · 13
- 2.0.2-9 · all · trixie
  Affected
  nvd · python-kafka · debian · 13
[python-kafka-doc]Affected
Source package: [python-kafka]
Details (2)
- 2.0.2-9 · all · trixie
  Affected
  nvd · python-kafka · debian · 13
- 2.0.2-9 · all · trixie
  Affected
  nvd · python-kafka · debian · 13

Observed: Oct 23, 2026, 9:46:21 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]