CVE-2025-26511: NetApp Instaclustr fork of Stratio's Cassandra-Lucene-Index plugin · Incorrect Authorization
Affects NetApp Instaclustr fork of Stratio's Cassandra-Lucene-Index pluginSource CVE Database V5
Not known to be exploited · CVSS 8.8 High.
Data as of 26 Oct 2026, 15:59 UTC
- EPSS
- 0.5% chance of exploitation in 30 days – higher than 47% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 13 Feb 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHubinstaclustr/cassandra-lucene-indexpkg:github/instaclustr/cassandra-lucene-indexOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
- Monitor official NetApp and Instaclustr advisories closely for patches addressing CVE-2025-26511 and apply them immediately upon release.
- Until patches are available, restrict access to Cassandra clusters running the vulnerable plugin to trusted administrators only, minimizing the number of authenticated users.
- Implement strict network segmentation and firewall rules to limit access to Cassandra nodes from untrusted networks.
- Enhance logging and monitoring of Cassandra user activities, focusing on unusual privilege escalations or access patterns.
- Conduct regular audits of RBAC configurations to ensure no excessive privileges are granted.
- Consider deploying additional security controls such as database activity monitoring (DAM) solutions to detect and alert on suspicious queries or commands.
- Educate administrators and developers about the risks of privilege escalation vulnerabilities and enforce the principle of least privilege.
- Evaluate alternative indexing solutions or plugin versions if immediate patching is not feasible, to reduce exposure.
Description
Systems running the Instaclustr fork of Stratio's Cassandra-Lucene-Index plugin versions 4.0-rc1-1.0.0 through 4.0.16-1.0.0 and 4.1.2-1.0.0 through 4.1.8-1.0.0, installed into Apache Cassandra version 4.x, are susceptible to a vulnerability which when successfully exploited could allow authenticated Cassandra users to remotely bypass RBAC and escalate their privileges.