CVE-2026-116593: Apache Kafka · Kafka Connect configuration provider values exposed via validation REST API endpoint
Affects Apache KafkaSource CVE Database V5
Not known to be exploited : upgrade to 4.3.2 or 4.2.2 soon.
Data as of 28 Oct 2026, 20:13 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- Patch
- Available – fixed in 4.3.2, 4.2.2
Exploitation evidence
Disclosed: evidence found.
CVE published 28 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade Apache to 4.3.2 or 4.2.2.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apache Kafkaorg.apache.kafka:connect-runtime | Affected
| Fixed in
|
| Apache Kafkaorg.apache.kafka:connect-runtime | Affected
| Fixed in
|
MavenApache Software Foundation/org.apache.kafka:connect-runtimepkg:maven/Apache Software Foundation/org.apache.kafka:connect-runtimeOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should upgrade Apache Kafka Connect to version 4.2.2, 4.3.2, 4.4.0 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
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.