How severe is CVE-2026-49091?

CVE-2026-49091 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-49091 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-49091?

CVE-2026-49091 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-49091?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2026-49091 published?

CVE-2026-49091 was published on 2026-07-01 and last updated on 2026-07-02.

CVE-2026-49091

CVE-2026-49091 is a high-severity vulnerability in Elastic Kibana with a CVSS 3.x base score of 8.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-116.

Key facts

Severity: High (CVSS 3.x base score 8.0)
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-116
Affected product: Elastic Kibana
Published: 2026-07-01
Last modified: 2026-07-02

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2026-49091?: CVE-2026-49091 has a CVSS 3.x base score of 8.0, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-49091 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-49091?: CVE-2026-49091 affects Elastic Kibana. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-49091?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2026-49091 published?: CVE-2026-49091 was published on 2026-07-01 and last updated on 2026-07-02.

References

https://discuss.elastic.co/t/kibana-7-17-15-8-11-1-security-update-esa-2026-53

Affected products (1)

cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*

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