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

highCVSS 8CVE-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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 8
Published: 2026-07-01
Last updated: 2026-07-02
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-49091

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-490910.20% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 10% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-49091	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

high[NEW] [high] Kibana: Multiple vulnerabilitiescert-bund
unknownMultiple vulnerabilities in Elastic products (July 2, 2026)cert-fr-avis

Recent advisories for Improper Output Neutralization

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

mediumCVE-2026-49099: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injecti…nvd · 2026-07-06
mediumCVE-2026-49098: Improper Input Validation, Improper Neutralization of Special Elements in Output Used by a Dow…nvd · 2026-07-06
mediumCVE-2026-49097: Improper Input Validation, Improper Neutralization of Special Elements in Output Used by a Dow…nvd · 2026-07-06
criticalCVE-2026-48203: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injecti…nvd · 2026-07-06
unknownCVE-2026-54889: Improper Neutralization of Input During Web Page Generation (XSS) vulnerability in leandrocp m…nvd · 2026-06-29