High severity · published Oct 1, 2026
CVE-2026-15911
Confluent Kafka Python Improper TLS Certificate Validation
7.4
CVSS
0.3%
EPSS
No
On KEV
Description
Confluent Kafka Python client's HashiCorp Vault KMS integration could allow a remote attacker to obtain sensitive information due to improper TLS certificate validation.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CO
confluent-kafka · confluent
through 2.14.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-15911
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-15911
vendor-advisory
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