CVE-2026-42401Improper Neutralization of Input During Web Page Generation in Kibana Leading to Stored HTML Injection
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Improper Neutralization of Input During Web Page Generation (CWE-79) in Kibana can lead to stored HTML injection. A user with write access to an Elasticsearch index could persist crafted markup which, when subsequently rendered through an affected Kibana view by another user, was not sufficiently sanitized. Successful exploitation could result in unauthorized UI manipulation and outbound network requests issued from the viewing user's browser session.
- CVSS
- 4.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N
- Weakness (CWE)
- CWE-79
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- elastic
- NVD analysis
- Analyzed
- Record last updated
- May 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Elastic Kibana elastic:kibana (from the name) | from 9.0.0 through 9.3.4; from 8.0.0 through 8.19.15 | CNA record |
elastic kibana elastic:kibana | from 8.0.0 before 8.19.16; from 9.0.0 before 9.3.5 | NVD |
References
- https://discuss.elastic.co/t/kibana-8-19-16-9-3-5-security-update-esa-2026-34/386552vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.