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.
Published: 2026-07-01
Score: 8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

An attacker may supply specially crafted input that Kibana writes to its log files without neutralizing terminal control sequences. When these log entries are viewed in a terminal that processes the escape codes, the displayed data can be altered, hidden, or even fabricated, thereby compromising the integrity of audit trails. The weakness corresponds to CWE‑117, improper output neutralization, and can lead to the kinds of tampering and forging described in CAPEC‑93.

Affected Systems

All deployments of Elastic Kibana that write user‑supplied data to logs without proper neutralization, regardless of specific patch level, are susceptible. The vulnerability does not reference a particular version, implying that any instance in which unsanitized input flows to the log subsystem is at risk.

Risk and Exploitability

The CVSS score of 8.0 classifies the issue as high severity, meaning that an exploitation could materially degrade security monitoring. The EPSS score of less than 1% indicates that widespread real‑world exploitation is unlikely at present, and the flaw is not listed in the CISA KEV catalog. Attacks would require the ability to inject content that reaches Kibana’s logging code; once such content appears in logs, an end‑user or administrator viewing the logs in a capable terminal can observe tampered data.

Generated by OpenCVE AI on July 17, 2026 at 12:20 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Update Kibana to a version that includes the log neutralization fix issued by Elastic.
  • Configure any log‑viewing interfaces or terminal applications to escape or strip terminal control sequences before rendering log entries.
  • Periodically scan existing log files for undocumented escape sequences and remediate any anomalous entries.

Generated by OpenCVE AI on July 17, 2026 at 12:20 UTC.

Tracking

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Advisories

No advisories yet.

History

Wed, 01 Jul 2026 22:45:00 +0000

Type Values Removed Values Added
First Time appeared Elastic
Elastic kibana
Vendors & Products Elastic
Elastic kibana

Wed, 01 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 01 Jul 2026 17:45:00 +0000

Type Values Removed Values Added
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.
Title Improper Output Neutralization for Logs in Kibana Leading to Log Injection
Weaknesses CWE-116
References
Metrics cvssV3_1

{'score': 8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: elastic

Published:

Updated: 2026-07-02T03:57:31.736Z

Reserved: 2026-05-27T11:31:33.582Z

Link: CVE-2026-49091

cve-icon Vulnrichment

Updated: 2026-07-01T17:57:00.555Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-17T12:30:05Z

Weaknesses
  • CWE-116

    Improper Encoding or Escaping of Output