PT-2026-2635 · Elastic · Kibana

Bryan Garcia + 1 · Published 2026-01-13 · Updated 2026-01-16 · CVE-2026-0543

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Kibana (affected versions not specified)

Description A flaw exists in Kibana's Email Connector due to improper input validation. An attacker with authenticated access and sufficient view-level privileges can trigger an excessive allocation of resources by providing a specially crafted email address as a parameter. This can lead to complete service unavailability for all users, requiring a manual restart to restore functionality.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Allocation of Resources Without Limits

RCE

Weakness Enumeration

CWE-770

CWE-20

Related Identifiers

BIT-ELK-2026-0543

BIT-KIBANA-2026-0543

CVE-2026-0543

Affected Products

Kibana

References · 7

• https://osv.dev/vulnerability/BIT-elk-2026-0543 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-0543 · Security Note
• https://discuss.elastic.co/t/kibana-8-19-10-9-1-10-9-2-4-security-update-esa-2026-08/384523 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-0543 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-kibana-2026-0543 · Vendor Advisory
• https://twitter.com/_nnxxrr_/status/2011768000983261564 · Twitter Post
• https://twitter.com/CVEnew/status/2011759649142329378 · Twitter Post