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

Improper Output Neutralization for Logs (CWE-117) in Kibana allows an attacker to supply crafted input that is written to log files without escaping terminal control sequences. When those logs are viewed in a terminal that interprets escape codes, the injected content may alter the displayed log data. The vulnerability can be leveraged to hide original log entries or insert fraudulent ones, compromising the integrity of audit trails.

Affected Systems

Elastic Kibana is the affected product. The CVE does not specify versions, so all unpatched instances that write user‑supplied data to logs are vulnerable.

Risk and Exploitability

The CVSS score of 8.0 classifies the vulnerability as high severity. The EPSS score of less than 1% indicates that exploitation is currently unlikely, and the issue is not listed in the CISA KEV catalog. Exploitation requires an attacker to inject terminal control sequences via any interface that logs user input. Once injected, viewing the resulting log entries in a terminal that renders escape codes can reveal tampered output, undermining trust in security monitoring and enabling concealment of malicious activity.

Generated by OpenCVE AI on August 3, 2026 at 06:00 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply the latest elasticity Kibana patch (7.17.15 or 8.11.1) as published in ESA-2026-53.
  • If a patch cannot be applied immediately, configure the logging pipeline to escape or neutralize control characters before writing logs to disk or displaying them in terminals.
  • Restrict logging of untrusted user input or limit the source of input that is allowed to be written to logs; enable strict input validation and use logging filters that drop or sanitize dangerous payloads.

Generated by OpenCVE AI on August 3, 2026 at 06:00 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

Status : Analyzed

Published: 2026-07-01T18:16:34.040

Modified: 2026-07-02T18:15:39.927

Link: CVE-2026-49091

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T06:15:04Z

Weaknesses
  • CWE-116

    Improper Encoding or Escaping of Output