CVE-2026-41115Disclosure(apache / kafka)

MEDIUMCVSS 4.3 · MEDIUM

Exploitation ongoing with high activity in latest observed window (1 mentions)

Immediate actions

  • Patch apache kafka systems immediately
  • Assume compromise if assets are exposed

Recommended action window: Immediate (within 24h)

NVD description

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.

4.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-285

Priority

MEDIUM

Exploitation

ACTIVE

PoC

NONE

Patch

AVAILABLE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • kafka

Threat summary

  • Active exploitation appears in 1 classified signals
  • Patch or workaround signal is available
  • 3 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Active exploitation reported across 1 signal
  • Patch or workaround mentioned in 1 signal
  • Technical details provided in 2 signals
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 2 mentions (2026-06-02); latest day: 1
  • 3 total mentions across 2 days

Affected systems

Vendors
Products
kafka

Deep dive

Activity timeline3 mentions / 2d
01122Mentions · 2026-06-02: 2Mentions · 2026-06-03: 1Active Exploitation · 2026-06-03: 1Patch / Workaround · 2026-06-02: 1Technical Details · 2026-06-02: 206-0206-03
Signal classification3 categories
Disclosure
133.3%
Patch
133.3%
Active Exploitation
133.3%
Referenced assets3 URLs
Classification over time
DateTotalLabels
2026-06-022
Disclosure1Patch1
2026-06-031
Active Exploitation1
Full discourse3 posts
  • Open Source Security mailing list@oss_security
    Disclosure

    CVE-2026-41115: Apache Kafka: Improper Authorization in CONSUMER_GROUP_DESCRIBE API https://www.openwall.com/lists/oss-security/2026/06/02/5 Severity: moderate

    Post summary

    A moderate‑severity CVE‑2026‑41115 for Apache Kafka, involving improper authorization in the CONSUMER_GROUP_DESCRIBE API, has been disclosed, but no PoC, exploit code, active exploitation, or patch information is included.

    01010500
    4.6K followersView on X
  • VulDB 🛡@vuldb
    Active Exploitation

    Some increased actor activities are shown targeting Apache Kafka (CVE-2026-41115) https://vuldb.com/vuln/367904/cti

    Post summary

    Threat actors are actively targeting Apache Kafka via CVE-2026-41115, but the post fails to provide exploit code, patch instructions, or technical vulnerability details.

    0000055
    2.2K followersView on X
  • Autumn Good@autumn_good_35
    Patch

    『We advise the Kafka users to review existing group ACLs to ensure the principle of least privilege.』 CVE-2026-41115 Apache Kafka: Improper Authorization in CONSUMER_GROUP_DESCRIBE API https://kafka.apache.org/community/cve-list/#CVE-2026-41115

    Post summary

    Kafka users are advised to review ACLs to mitigate an improper authorization CVE; no PoC, exploit, or active use is reported.

    00000653
    6.9K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appapachekafka---

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