TI-2026-13330 Aliases CVE-2026-15911 GHSA-r743-crv8-m3qr

Confluent Kafka Python Improper TLS Certificate Validation

LOW 34CWE-295Published 2026-10-01 · Updated 2026-10-06

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Spoofing
Confidentiality · integrity · availability: High · High · None
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-295.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00297 22nd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
confluent	confluent-kafka	up to 2.14.2	—	No fix listed	CNA

confluent-kafka Vendorconfluent Affected up to 2.14.2 Fixed in — No fix listed CNA

CPE names CNA · 2

CPE	Versions	Role	Vendor
cpe:2.3:a:confluent:confluent-kafka::::::::	—	—	confluent
cpe:2.3:a:confluent:confluent-kafka:2.14.2:::::::*	2.14.2	—	confluent

cpe:2.3:a:confluent:confluent-kafka:*:*:*:*:*:*:*:* Versions — — ·confluent
cpe:2.3:a:confluent:confluent-kafka:2.14.2:*:*:*:*:*:*:* Versions 2.14.2 — ·confluent

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Satellite 6	Affected	No fix yet

Timeline

2026-10-02 Threatist record created from CVE-2026-15911
2026-10-03 Alias added: GHSA-r743-crv8-m3qr
2026-10-06 CISA SSVC decision points changed

References

Patch 1

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

TI-2021-13224 Confluent Ansible (cp-ansible) version 5.5.0, 5.5.1, 5.5.2 and 6.0.0 is vulnerable to… CVSS 3.1CRITICAL 9.8
TI-2021-13223 Insecure permissions in Confluent Ansible (cp-ansible) 5.5.0, 5.5.1, 5.5.2 and 6.0.0… CVSS 3.1MEDIUM 5.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences