CVE-2026-25999Network attack vector

Cross-tenant metadata clearing via unchecked cache reset

Published Feb 11, 2026 · Updated Feb 11, 2026

Improper authorization in Aiven Klaw before 2.10.2 allows remote authenticated users to clear tenant metadata through a crafted request. The resetMemoryCache controller accepted caller-selected reset entities and invoked cache-reset service logic without requiring an Authorization header or checking administrative permission. Any low-privileged account able to reach the endpoint can clear cached configurations, environments, and cluster data for any tenant, interrupting service state.

CVSS severity7.1
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authorization in Aiven Klaw before 2.10.2 allows remote authenticated users to clear tenant metadata through a crafted request. The resetMemoryCache controller accepted caller-selected reset entities and invoked cache-reset service logic without requiring an Authorization header or checking administrative permission. Any low-privileged account able to reach the endpoint can clear cached configurations, environments, and cluster data for any tenant, interrupting service state.

The record

CVE
CVE-2026-25999
Published
Feb 11, 2026
Updated
Feb 11, 2026
Vendor
Aiven
Product
Klaw
Classifications
CWE-285, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 2.10.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Aiven · Klawversion=< 2.10.2

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
7.1GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-285Improper Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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