CVE-2026-49088

Description

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.

CVSS v3.1 Score

4.4

MEDIUM

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS — Exploit Prediction

0.0021

Probability of exploitation

0.11%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-532 CWE-532

Affected Products

Vendor	Product	Versions
elastic	kibana	8.0.0 — 8.18.9
elastic	kibana	8.19.0 — 8.19.6
elastic	kibana	9.0.0 — 9.0.8
elastic	kibana	9.1.0 — 9.1.6

References

Advisories & Patches

https://discuss.elastic.co/t/kibana-8-18-9-8-19-6-9-0-8-9-1-6-security-update-esa-2026-50

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 4.4 (MEDIUM).

How severe is CVE-2026-49088? +

CVE-2026-49088 has a CVSS v3.1 score of 4.4 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0021, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-49088? +

CVE-2026-49088 affects products from elastic, specifically: kibana. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-49088? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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