Unknown severity · Source severity not reportedCVE-2026-116593

Apache Kafka: Kafka Connect configuration provider values exposed via validation REST API endpointCVE-2026-116593

Answer in brief

CVE-2026-116593 records a Unknown severity vulnerability in Apache Kafka: Kafka Connect configuration provider values exposed via validation REST API endpoint. The current sources do not mark it as known exploited. The current feed maps Apache Software Foundation/org.apache.kafka:connect-runtime (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 28, 2026Updated Oct 28, 2026Source checked Oct 28, 2026First seen by HOL Oct 28, 2026Material review Oct 28, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Apache Software Foundation/org.apache.kafka:connect-runtime (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Apache Software Foundation/org.apache.kafka:connect-runtimegeneric	>=2.4.0 <4.2.2 \|\| >=4.3.0 <4.3.2	4.2.2, 4.3.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for Apache Software Foundation/org.apache.kafka:connect-runtime.
Review the reported fix. Update Apache Software Foundation/org.apache.kafka:connect-runtime to 4.2.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 28, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 28, 2026

Sources and claim methodology

Source referencekafka.apache.org

Upstream source description

Apache Kafka Connect has the /connector-plugins/{connector-type}/config/validate endpoint on its REST API to validate connector configurations. Apache Kafka Connect also support Configuration Providers which enable to hide the values of sensitive configuration and only resolve them at runtime. An attacker with access to the validate endpoint can use it to resolve and return plaintext values via any of the configuration providers installed on a Connect worker. Users are recommended to upgrade to version 4.2.2, 4.3.2, 4.4.0 or above, which fix this issue.

Quoted source text, attributed separately from HOL analysis.