What is CVE-2026-49088?

CVE-2026-49088 is a medium-severity vulnerability in Elastic Kibana, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.4/10. Published 2026-07-01.

How severe is CVE-2026-49088?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Information disclosure in Elastic Kibana

CVE-2026-49088

Insertion of Sensitive Information into Log File (CWE-532) in Kibana can lead to information disclosure. When the optional application performance monitoring (APM) instrumentation is enabled, sensitive request header values could be recorded in application logs, where they may be accessible to operators with log access.

EPSS: 0.002 (11.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.

Affected products

Elastic Kibana — versions 8.0.0, 9.1.0, 9.0.0

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

security@elastic.co (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-49088?: CVE-2026-49088 is a medium-severity vulnerability in Elastic Kibana, classified under Insertion of Sensitive Information into Log File. CVSS score: 4.4/10. Published 2026-07-01.
How severe is CVE-2026-49088?: Medium severity. CVSS v3 base score is 4.4 out of 10.