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No exploitation reportedAwaiting NVD analysis

CVE-2026-116593

Apache Kafka: Kafka Connect configuration provider values exposed via validation REST API endpoint

No exploitation reported by the sources we read.

  • Published2026-10-28
  • WeaknessCWE-200

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC
  1. 2026-10-2816:46CVE publishedCNA

Versions per branch

Products declared by the CNA

As apache, the CNA that assigned this CVE, declared them in the CVE record; versions as written. NVD lists no product for this CVE yet: this is the only product data so far.

  • Apache Software Foundation Apache Kafkaother versions: not affected

    package org.apache.kafka:connect-runtimehttps://repo.maven.apache.org/maven2

    Affected
    • ≥ 2.4.0, < 4.2.2fixed in 4.2.2semver
    • ≥ 4.3.0, < 4.3.2fixed in 4.3.2semver

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-10-30

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2026-116593 yet.

Full record on NVD

Fix

No fix published by the sources we read yet. NVD record

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Published
2026-10-28
Last Modified
2026-11-05
NVD status
Awaiting Analysis
GitHub Advisory
GHSA-mf84-q3cw-6ch9

Frequently asked questions

What is CVE-2026-116593?

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.

Is CVE-2026-116593 actively exploited?

Active exploitation of CVE-2026-116593 has not been confirmed. Its EPSS score was 0.2% on 2026-11-05, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-116593?

CVE-2026-116593 has a CVSS v3 base score of 8.1 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N.

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