Is CVE-2025-26467 actively exploited?

No active exploitation of CVE-2025-26467 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-26467 be exploited remotely?

Yes. CVE-2025-26467 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-26467?

CVE-2025-26467 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2025-26467

CWE-267Published: August 25, 2025· Updated: Jun 17, 2026

8.8

CVSS v3.1

Official Description

Privilege Defined With Unsafe Actions vulnerability in Apache Cassandra. An user with MODIFY permission ON ALL KEYSPACES can escalate privileges to superuser within a targeted Cassandra cluster via unsafe actions to a system resource. Operators granting data MODIFY permission on all keyspaces on affected versions should review data access rules for potential breaches.

This issue affects Apache Cassandra 3.0.30, 3.11.17, 4.0.16, 4.1.7, 5.0.2, but this advisory is only for 4.0.16 because the fix to CVE-2025-23015 was incorrectly applied to 4.0.16, so that version is still affected.

Users in the 4.0 series are recommended to upgrade to version 4.0.17 which fixes the issue. Users from 3.0, 3.11, 4.1 and 5.0 series should follow recommendation from CVE-2025-23015.

NVD Source

Technical Analysis

CVE-2025-26467 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.