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CVE-2026-15911

HighPublished

Confluent Kafka Python Improper TLS Certificate Validation

Published: Oct 1, 2026
Updated: Oct 1, 2026
Assigning CNA: ibm
Evidence observed: Oct 5, 2026

Primary CVSS

7.4/ 10High

nvd · CVSS 3.1

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

EPSS probability estimate

0.2%

Low · next 30 days

Percentile: 9.1%
Model date: Oct 3, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation.

Sources

CVE-2026-15911-Confluent_KafkaPoC
Disabled TLS Certificate Verification for HashiCorp Vault KMS in confluent-kafka

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