Vulnerability-Lookup

WID-SEC-W-2026-1765

Vulnerability from csaf_certbund - Published: 2026-06-01 22:00 - Updated: 2026-06-02 22:00

Summary

Apache Kafka: Schwachstelle ermöglicht Offenlegung von Informationen

Severity

Niedrig

Notes

Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.

Produktbeschreibung: Apache Kafka ist eine verteilte Streaming-Plattform mit einer Publish-Subcribe-Architektur (Pub-Sub).

Angriff: Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Apache Kafka ausnutzen, um Informationen offenzulegen.

Betroffene Betriebssysteme: - Linux - UNIX

CVE-2026-41115

Affected products

Known affected 1 product

Product	Identifier	Version	Remediation
Apache Kafka 4.0.0-4.3.0 Apache / Kafka	`cpe:/a:apache:kafka:4.0.0_-_4.3.0`	4.0.0-4.3.0

References

5 references

URL	Category
https://wid.cert-bund.de/.well-known/csaf/white/2…	self
https://wid.cert-bund.de/portal/wid/securityadvis…	self
https://lists.apache.org/thread/ql50wrhv4skfh4ykq…	external
https://lists.apache.org/thread/o30vf031nsyrcfm9c…	external
https://github.com/apache/kafka-site/pull/875	external

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "niedrig"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "Apache Kafka ist eine verteilte Streaming-Plattform mit einer Publish-Subcribe-Architektur (Pub-Sub).",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in Apache Kafka ausnutzen, um Informationen offenzulegen.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-1765 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1765.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1765 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1765"
      },
      {
        "category": "external",
        "summary": "Apache Mailing List vom 2026-06-01",
        "url": "https://lists.apache.org/thread/ql50wrhv4skfh4ykq4k3k1qxo2j1827p"
      },
      {
        "category": "external",
        "summary": "Apache Mailing List vom 2026-06-01",
        "url": "https://lists.apache.org/thread/o30vf031nsyrcfm9c93y3913qq6pyso8"
      },
      {
        "category": "external",
        "summary": "Apache Fix vom 2026-06-01",
        "url": "https://github.com/apache/kafka-site/pull/875"
      }
    ],
    "source_lang": "en-US",
    "title": "Apache Kafka: Schwachstelle erm\u00f6glicht Offenlegung von Informationen",
    "tracking": {
      "current_release_date": "2026-06-02T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-03T06:02:59.842+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
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      "id": "WID-SEC-W-2026-1765",
      "initial_release_date": "2026-06-01T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-06-01T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-06-02T22:00:00.000+00:00",
          "number": "2",
          "summary": "Referenz(en) aufgenommen: EUVD-2026-33904"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
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        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "4.0.0-4.3.0",
                "product": {
                  "name": "Apache Kafka 4.0.0-4.3.0",
                  "product_id": "T054934",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:apache:kafka:4.0.0_-_4.3.0"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Kafka"
          }
        ],
        "category": "vendor",
        "name": "Apache"
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      "product_status": {
        "known_affected": [
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      },
      "release_date": "2026-06-01T22:00:00.000+00:00",
      "title": "CVE-2026-41115"
    }
  ]
}

CVE-2026-41115 (GCVE-0-2026-41115)

Vulnerability from cvelistv5 – Published: 2026-06-02 08:56 – Updated: 2026-06-02 17:33

Title

Apache Kafka: Improper Authorization in CONSUMER_GROUP_DESCRIBE API

Summary

An improper authorization vulnerability has been identified in Apache Kafka. The implementation of the CONSUMER_GROUP_DESCRIBE (69) API validates the DESCRIBE operation on the GROUP resource instead of the READ operation that documented in the official kafka documentation and the KIP-848. This discrepancy can result in misconfigured Access Control Lists (ACLs) and unintended security postures, like granting READ permission to users who should not be able to join/sync groups, or allowing users without READ permission (but with DESCRIBE permission) to access sensitive group metadata. The correct permission for CONSUMER_GROUP_DESCRIBE API is DESCRIBE GROUP so the current implementation is correct. However, the kafka documentation as well as the KIP-848 will be updated to reflect the correct permission. We advise the Kafka users to review existing group ACLs to ensure the principle of least privilege.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-285 - Improper Authorization

Assigner

apache

References

2 references

URL	Tags
https://kafka.apache.org/cve-list	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/06/02/5

Impacted products

1 product

Vendor	Product	Version
Apache Software Foundation	Apache Kafka	Affected: 4.0.0 , ≤ 4.3.0 (semver)

Credits

Luke Chen <showuon@gmail.com>

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

WID-SEC-W-2026-1765

CVE-2026-41115 (GCVE-0-2026-41115)

Tags

Sightings

Nomenclature