What is CVE-2026-78593?

CVE-2026-78593 is a medium-severity vulnerability, classified under Code Injection. CVSS score: 4.3/10. Published 2026-09-03.

How severe is CVE-2026-78593?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CVE-2026-78593

CVE-2026-78593

An insufficiently validated configuration field in Kibana's Cribl integration allows an authenticated user holding Kibana Fleet management privileges to inject attacker-controlled expressions into a server-side script template, resulting in an Elasticsearch ingest pipeline being written beyond the caller's authorized Elasticsearch permissions.

Vulnerability class: RCE (Remote Code Execution)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Weakness classification (CWE)

CWE-94 — Code Injection

References

security@elastic.co

Frequently asked questions

What is CVE-2026-78593?: CVE-2026-78593 is a medium-severity vulnerability, classified under Code Injection. CVSS score: 4.3/10. Published 2026-09-03.
How severe is CVE-2026-78593?: Medium severity. CVSS v3 base score is 4.3 out of 10.