CVE-2026-83525

    Dashboard / Vulnerabilities / CVE-2026-83525

    CVE-2026-83525

    Published: 28 Oct 2026Last Modified: 7 Nov 2026

    Summary: Apache Kafka: Incorrect boolean operator in FetchSnapshot RPC handler allows authenticated network clients to crash the KRaft controller via a malformed request.

    Details: Incorrect operator (CWE-480) in the FetchSnapshot RPC handler in Apache Kafka from 2.8.0 before 4.2.2, and from 4.3.0 before 4.3.2 on all platforms allows an authenticated attacker with CLUSTER_ACTION privilege to cause a denial of service (controller process termination) via a crafted FetchSnapshotRequest with an empty topics array or a topic with no partitions. Users are recommended to upgrade to version 4.2.2, 4.3.2, or 4.4.0, which fix this issue. Users on unsupported branches (4.1.x and earlier) should upgrade to 4.2.2 or later.

    References: http://www.openwall.com/lists/oss-security/2026/10/28/7, https://repo.maven.apache.org/maven2, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83525.json, https://kafka.apache.org/cve-list, https://nvd.nist.gov/vuln/detail/CVE-2026-83525, https://github.com/apache/kafka/pull/23185

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- ebb1d6e21cc9213071ee1c6a15ec3411fc215b81
    Fixed -c5e942859576203e1b00260070fe6241b64db251

    Affected versions

    4.3.2-rc1
    4.3.1-rc2
    4.3.1
    4.3.1-rc1
    4.3.1-rc0
    4.3.0-rc2
    4.3.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-83525 | CVE-DB