Apache Kafka October Update Fixes Twelve Vulnerabilities
Tech GuruQuick Answer
Apache's October Kafka entries document twelve vulnerabilities across brokers, clients, Connect, OAuth, and Streams. Inventory components and exact branches, apply the CVE-specific fixed release, validate authentication and data paths, review anomalies where warranted, and retain evidence.
Confirm Scope And Apply The Supported Remediation
What to do now: Inventory Kafka clusters, brokers, clients, Connect workers, Streams applications, OAuth validators, telemetry endpoints, versions, authentication modes, exposed listeners, owners, and maintenance windows. Map each component and configuration to the corresponding Apache CVE entry; do not treat one fixed maintenance number as applicable to every branch or infer exposure without the stated protocol, OAuth, Connect, or Streams path. Move to Kafka 4.4.0 or the supported fixed maintenance build listed for the affected branch, including 4.2.2 or 4.3.2 where applicable, and rebuild dependent clients and Connect images. Confirm broker and application versions, test authentication, authorization, replication, Connect administration, telemetry, Streams punctuation and representative record processing, review relevant logs, and retain dependency and change evidence.
Last verified: 2026-10-29 UTC. Recheck the authoritative advisory and supported distribution channel before changing production.
Scope And Authority
| Product scope | Apache Kafka brokers, clients, Kafka Connect, and Kafka Streams |
|---|---|
| Advisory | Apache Kafka October 2026 CVE Batch |
| CVEs | CVE-2026-110952, CVE-2026-110985, CVE-2026-111073, CVE-2026-111108, CVE-2026-111115, CVE-2026-111496, CVE-2026-111551, CVE-2026-112375, CVE-2026-114349, CVE-2026-115644, CVE-2026-116593, CVE-2026-83525 |
| Authoritative release date | 2026-10-28 16:37:19.893 UTC |
| Authority revision date | 2026-10-28 21:31:15 UTC |
| Affected versions | CVE-specific Apache Kafka ranges spanning legacy releases through 4.3.1; affected components and prerequisites differ across broker protocol handling, OAuth, Connect, Streams, and client deserialization. |
| Fixed version | Apache Kafka 4.4.0, or the applicable fixed maintenance release such as 4.2.2 or 4.3.2 where the Apache CVE entry lists that branch |
| CVSS base score | Not provided by the authority |
| CVSS severity | Not provided by the authority |
| Exploitation status | Apache does not state that these vulnerabilities are being maliciously exploited.; no exploitation claim is inferred. |
What Changed
Apache added twelve Kafka vulnerabilities covering OAuth validation failures, Connect authentication and secret exposure, arbitrary broker file read, protocol and record-batch memory exhaustion, and Kafka Streams hangs.
What To Validate Now
- Inventory. Inventory Kafka clusters, brokers, clients, Connect workers, Streams applications, OAuth validators, telemetry endpoints, versions, authentication modes, exposed listeners, owners, and maintenance windows.
- Establish applicability. Map each component and configuration to the corresponding Apache CVE entry; do not treat one fixed maintenance number as applicable to every branch or infer exposure without the stated protocol, OAuth, Connect, or Streams path.
- Remediate. Move to Kafka 4.4.0 or the supported fixed maintenance build listed for the affected branch, including 4.2.2 or 4.3.2 where applicable, and rebuild dependent clients and Connect images.
- Validate. Confirm broker and application versions, test authentication, authorization, replication, Connect administration, telemetry, Streams punctuation and representative record processing, review relevant logs, and retain dependency and change evidence.
- Retain evidence. Preserve asset and owner identifiers, the applicability decision, before-and-after versions, change approval, installation output, validation results, and any exception or rollback record.
Operational Cautions
Some issues can exhaust broker memory or bypass authentication controls. Coordinate rolling upgrades and compatibility testing, and preserve broker, Connect and identity-provider evidence before cleanup when suspicious activity is found.
Evidence To Retain
- Exact product, release stream, package or application version, enabled feature, environment, and accountable owner.
- UTC timestamps, authority revision, approved change record, installer or package-manager output, and resulting version.
- Relevant logs and monitoring evidence, test results, exceptions, compensating controls, and rollback decisions.
Related TechGeeks Resources
Authoritative References
Correction policy: If the authority changes affected versions, fixed versions, severity, exploitation information, mitigations, or required action, TechGeeks will update this notice and its verification date.
