Is CVE-2026-26940 actively exploited?

No active exploitation of CVE-2026-26940 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-26940 be exploited remotely?

Yes. CVE-2026-26940 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-26940?

CVE-2026-26940 has a CVSS score of 6.5 (MEDIUM).

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MEDIUM

CVE-2026-26940

CWE-1284Published: March 19, 2026· Updated: Mar 23, 2026

6.5

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:13.2th

Official Description

Improper Validation of Specified Quantity in Input (CWE-1284) in the Timelion visualization plugin in Kibana can lead Denial of Service via Excessive Allocation (CAPEC-130). The vulnerability allows an authenticated user to send a specially crafted Timelion expression that overwrites internal series data properties with an excessively large quantity value.

NVD Source

Technical Analysis

CVE-2026-26940 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 6.5.