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TI-2026-82021 Aliases CVE-2026-83525GHSA-34hc-fwhq-c7v8

Incorrect operator in Kafka FetchSnapshot enables controller crash

Priority LOW 29CWE-480Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA.

Summary

Apache Kafka from 2.8.0 before 4.2.2, and from 4.3.0 before 4.3.2, contains an incorrect operator in the FetchSnapshot RPC handler (CWE-480). A crafted FetchSnapshotRequest with an empty topics array or a topic with no partitions terminates the KRaft controller process. An authenticated attacker with CLUSTER_ACTION privilege can cause this denial of service on all platforms.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0033 26th percentileScored 2026-11-07
Fix Fixed Apache Kafka (Apache Software Foundation): 4.2.2, 4.3.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApacheApache Kafka2.8.0 to before 4.2.2; 4.3.0 to before 4.3.24.2.2, 4.3.2Patch availableCNA
  • Apache Kafka VendorApache Affected 2.8.0 to before 4.2.2; 4.3.0 to before 4.3.2 Fixed in 4.2.2, 4.3.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:apache:kafka:*:*:*:*:*:*:*:*——Apache
  • cpe:2.3:a:apache:kafka:*:*:*:*:*:*:*:* Versions — — ·Apache

Remediation

Upgrade Apache Kafka to version 4.2.2 or 4.3.2, which fix this issue. Users on unsupported branches (4.1.x and earlier) should upgrade to 4.2.2 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

  • Fix · CNA Apache Kafka (Apache Software Foundation) Fixed in 4.2.2, 4.3.2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apache Kafka 4.2.2, 4.3.2

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-82054 Authentication bypass in Apache Kafka Connect admin REST APIPriority MEDIUM 41
    • TI-2026-82055 Kafka Connect validate endpoint exposes resolved configuration valuesPriority LOW 38
    Show all 3 records →

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-83525
  2. 2026-10-28 Alias added: GHSA-34hc-fwhq-c7v8
  3. 2026-11-05 CVSS score added · CISA ADP
  4. 2026-11-05 CISA SSVC decision points changed
  5. 2026-11-06 Affected versions changed · Red Hat
  6. 2026-11-06 CVSS score added · Red Hat

References

Patch 1

Advisory 1

  • TI-2025-18529 Apache Tomcat: Potential RCE and/or information disclosure and/or information corruption with partial PUT KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-30292 Apache OFBiz: Confused controller-view authorization logic (forced browsing) KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-26062 Apache OFBiz: Unauthenticated endpoint could allow execution of screen rendering code KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-21190 Apache OFBiz: Path traversal leading to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2024-18186 Apache HugeGraph-Server: Command execution in gremlin KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-25106 Deserialization of untrusted data in Apache ActiveMQ KEVCVSS 3.1CRITICAL 10.0
See all 4053 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences