CVE-2026-15911

HIGH 7.4

Confluent Kafka Python Improper TLS Certificate Validation

CVSS Score

7.4

EPSS Score

0.0%

EPSS Percentile

0th

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

CWE	CWE-295
Vendor	confluent
Product	confluent-kafka
Published	Oct 1, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

confluent / confluent-kafka

0 ≤ 2.14.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

support.confluent.io: https://support.confluent.io/hc/en-us/articles/54133146724244-CONFSA-2026-22-CVE-2026-15911-Confluent-Kafka-Python-Client-Vulnerability-TLS-Certificate-verification-disabled-by-default-in-HashiCorp-Vault-KMS-Integration

Credits

Rahul Karne