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CVE-2026-49091— Improper Output Neutralization for Logs in Kibana Leading to Log Injection

Quick assessment

Affected
Elastic Kibana
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Elastic kibana是荷兰Elastic公司开源的一个数据可视化平台。 Elastic Kibana 8.0.0版本至8.11.0版本和7.0.0版本至7.17.14版本存在输出处理不当漏洞，该漏洞源于日志输出处理不当，可能允许攻击者通过特制输入进行日志注入，修改显示数据。

CVSS 8.0 · High EPSS 0.32% · P22

Possible ATT&CK Techniques 1 AI

T1560.001 · Archive via Utility

Affected Version Matrix 2

VendorProduct Version RangeStatus
Elastic Kibana 8.0.0≤ 8.11.0 affected
7.0.0≤ 7.17.14 affected
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I. Basic Information for CVE-2026-49091

Vulnerability Information
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Vulnerability Title
Improper Output Neutralization for Logs in Kibana Leading to Log Injection
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对输出编码和转义不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Kibana 输出处理不当漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic kibana是荷兰Elastic公司开源的一个数据可视化平台。 Elastic Kibana 8.0.0版本至8.11.0版本和7.0.0版本至7.17.14版本存在输出处理不当漏洞，该漏洞源于日志输出处理不当，可能允许攻击者通过特制输入进行日志注入，修改显示数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Elastic Kibana 8.0.0 ~ 8.11.0 -

II. Public POCs for CVE-2026-49091

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III. Intelligence Information for CVE-2026-49091

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Vendor Advisories for CVE-2026-49091 (1)

Same Patch Batch · Elastic · 2026-07-01 · 9 CVEs total

CVE-2026-49090 6.5 MEDIUM Uncontrolled Resource Consumption in Elasticsearch Leading to Denial of Service
CVE-2026-49087 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-56150 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Fleet Server Leading to Denial of
CVE-2026-56148 6.5 MEDIUM Uncontrolled Recursion in Elasticsearch Leading to Denial of Service
CVE-2026-56151 6.5 MEDIUM Improper Input Validation in Kibana Leading to Denial of Service
CVE-2026-56152 5.3 MEDIUM Incorrect Authorization in Kibana Leading to Information Disclosure
CVE-2026-56149 4.9 MEDIUM Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of
CVE-2026-49088 4.4 MEDIUM Insertion of Sensitive Information into Log File in Kibana Leading to Information Disclosu

IV. Related Vulnerabilities

Same product: Kibana
Same vendor: Elastic
Same weakness: CWE-116

V. Comments for CVE-2026-49091

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