Vulnerability in Elastic Kibana
CVE-2026-49091
Improper Output Neutralization for Logs (CWE-117) in Kibana can lead to log injection via Log Injection-Tampering-Forging (CAPEC-93). An attacker can supply specially crafted input that is written to log files without proper neutralization. When the log files are subsequently viewed in a terminal that interprets control sequences, the injected content may alter the displayed log data.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (22.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 22.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Elastic Kibana — versions 8.0.0, 7.0.0
Weakness classification (CWE)
References
- discuss.elastic.co/t/kibana-7-17-15-8-11-1-security-update-esa-2026-53 (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-49091?
- CVE-2026-49091 is a high-severity vulnerability in Elastic Kibana, classified under Improper Encoding or Escaping of Output. CVSS score: 8.0/10. Published 2026-07-01.
- How severe is CVE-2026-49091?
- High severity. CVSS v3 base score is 8.0 out of 10.