High severity · published Jul 1, 2026
CVE-2026-49091
Improper Output Neutralization for Logs in Kibana Leading to Log Injection
8.0
CVSS
0.3%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
Kibana · Elastic
8.0.0 through 8.11.0; 7.0.0 through 7.17.14 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49091
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49091
Vendor Advisory
https://discuss.elastic.co/t/kibana-7-17-15-8-11-1-security-update-esa-2026-53
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