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High 2 vendors · 2 advisories

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

CVE-2026-116593 key facts

CISA KEV
Not listed (catalogue checked )
Highest advisory rating
High
CVSS base score
7.5 (Red Hat)
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N · base score 8.1, scored by CISA-ADPAttack vector: network. Attack complexity: low. Privileges required: low. User interaction: none. Scope: unchanged. Confidentiality impact: high. Integrity impact: high. Availability impact: none.
Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
EPSS
0.47% chance of exploitation in the next 30 days (41st percentile). FIRST EPSS, .
CISA SSVC
Exploitation: none observed. Automatable: no. Technical impact: total. CISA, .
Fixed releases
  • Apache: 4.2.2, 4.3.2
  • Red Hat: 4.2.2, 4.3.2, 4.4.0
Vendor advisories
2 from Apache, Red Hat
Assigned by
apache (CNA)
CVE record published
Listed by VulniPulse
Record changed

Ratings, versions and fixes are quoted from the vendor advisories that cover only CVE-2026-116593; each belongs to its advisory, not to every product listed. How records are collected and checked.

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.

Text from the CVE.org record (apache).

How do I fix CVE-2026-116593?

Upgrade to a fixed release named by the vendor:

  • Apache: 4.2.2, 4.3.2
  • Red Hat: 4.2.2, 4.3.2, 4.4.0
  • Apache Kafka Connect also support Configuration Providers which enable to hide the values of sensitive configuration and only resolve them at runtime. (Apache)
  • Users are recommended to upgrade to version 4.2.2, 4.3.2, 4.4.0 or above, which fix this issue. (Apache)

Vendor advisories for CVE-2026-116593

Apache

1 advisory
  • Advisory severityUnrated

    Advisory [CVE-2026-116593] Apache Kafka: Kafka Connect configuration provider values exposed via validation REST API endpoint

    CVE-2026-116593Source published Source updated

    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.

    Affected products in this advisory
    • Apache Kafka
    Source-reported affected versions
    • Apache Kafka 2.4.0 before 4.2.2
    • Apache Kafka 4.3.0 before 4.3.2
    Source-reported fixed versions
    • 4.2.2
    • 4.3.2
    Mitigation guidance
    • Apache Kafka Connect also support Configuration Providers which enable to hide the values of sensitive configuration and only resolve them at runtime.
    • Users are recommended to upgrade to version 4.2.2, 4.3.2, 4.4.0 or above, which fix this issue.
    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory

References

Timeline

  1. CVE record published
  2. First vendor advisory listed by VulniPulse
  3. CVE record last updated

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