What is the CVSS score of CVE-2026-25999?

CVE-2026-25999 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H. EPSS exploitation probability: 0.0%.

How to fix or mitigate CVE-2026-25999?

Within 24 hours: Assess current Klaw deployment scope and identify all affected instances running versions prior to 2.10.2; restrict network access to Klaw administrative interfaces to trusted IPs only. Within 7 days: Apply vendor patch to upgrade all Klaw instances to version 2.10.2 or later; conduct post-patch validation testing. Within 30 days: Review access logs for unauthorized metadata modification attempts; implement additional authentication controls and audit logging for administrative actions.

Klaw CVE-2026-25999

HIGH

Improper Authorization (CWE-285)

2026-02-11 security-advisories@github.com

Apache Klaw Aiven

7.1

CVSS 3.1 · GitHub Advisory

View

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

Access

Authenticate as low-privileged user
Exploit

Send POST to /resetMemoryCache endpoint
Execution

Clear tenant metadata cache
Impact

Disrupt Kafka governance operations

Vulnerability Assessment

Weakness	CWE CWE-285 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Authorization verification MITRE ATT&CK 1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Exploitation Conditions	Klaw versions prior to 2.10.2 with /resetMemoryCache endpoint exposed. Attacker requires valid login credentials (any authenticated user account). No administrative privileges needed.
Impact	CVSS 7.1 (HIGH). Attack vector: Network. Complexity: Low. Privileges required: Low. User interaction: None. Exploitation no authentication required.
Exploit ScenarioDerived	An attacker without authentication could exploit this vulnerability to trigger a reset or deletion of metadata for any tenant.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 12, 2026

Klaw versions before 2.10.2 contain an improper access control flaw in the /resetMemoryCache endpoint that allows authenticated attackers to wipe cached metadata, configurations, and cluster data across any tenant without proper authorization. This vulnerability affects Apache Kafka deployments using Klaw for topic governance and could disrupt Kafka cluster management and visibility. A patch is available in version 2.10.2 and later.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 22:02 CVSS 7.1

RemediationAI

A vendor patch is available — apply it immediately. Fixed in version 2.10.2.. Restrict network access to the affected service where possible.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Classified as CWE-285 (Improper Authorization). Affects Klaw. Klaw is a self-service Apache Kafka Topic Management/Governance tool/portal. Prior to 2.10.2, there is an improper access control vulnerability that allows unauthorized users to trigger a reset or deletion of metadata for any tenant. By sending a crafted request to the /resetMemoryCache endpoint, an attacker can clear cached configurations, environments, and cluster data. This vulnerability is fixed in 2.10.2.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

GitHub Advisory PRIMARY 7.1 HIGH

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

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

High

Lifecycle Timeline

Patch released

Feb 26, 2026 - 23:25 nvd

Patch available

CVE Published

Feb 11, 2026 - 21:16 nvd

HIGH 7.1

DescriptionGitHub Advisory

Klaw is a self-service Apache Kafka Topic Management/Governance tool/portal. Prior to 2.10.2, there is an improper access control vulnerability that allows unauthorized users to trigger a reset or deletion of metadata for any tenant. By sending a crafted request to the /resetMemoryCache endpoint, an attacker can clear cached configurations, environments, and cluster data. This vulnerability is fixed in 2.10.2.

Executive ViewAI

Why It Matters

A high-severity access control vulnerability in Klaw (CVE-2026-25999) allows unauthorized users to delete or reset metadata for any tenant without authentication. Organizations using Klaw for Kafka governance face potential data loss, service disruption, and compliance violations if exploited. Immediate patching is required to prevent unauthorized access to critical Kafka infrastructure management.

Business Impact: High

Compensating Controls

Apply vendor patch. If immediate patching is delayed: (1) Restrict Klaw portal network access via firewall to authorized users/networks only; (2) Implement WAF rules to require authentication headers on metadata-modifying endpoints; (3) Disable tenant metadata reset/deletion features at the application level if not critical; (4) Enable detailed audit logging and monitoring for any metadata alteration attempts; (5) Maintain frequent backups of Kafka topic configurations and tenant metadata.

Threat Intelligence Overview

EPSS Score

0.0%

Top 91% exploitable

Data Quality

4 sources

Confidence: Medium

NVD

CVE.org

EPSS

GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.0%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.