CVE-2026-26936 — Regex Denial of Service in Kibana

CWE-1333 — Regex Denial of Service4 documents4 sources
Severity
7.5HIGHNVD
CNA4.9
EPSS
0.1%
top 76.70%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Elastic Kibana
Timeline
PublishedFeb 26

Description

Inefficient Regular Expression Complexity (CWE-1333) in the AI Inference Anonymization Engine in Kibana can lead Denial of Service via Regular Expression Exponential Blowup (CAPEC-492).

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages2 packages

▶NVDelastic/kibana8.0.0 — 8.19.11+1
▶CVEListV5elastic/kibana9.0.0 — 9.2.4+1

🔴Vulnerability Details

2
CVEList
Inefficient Regular Expression Complexity in Kibana Leading to Denial of Service↗2026-02-26
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GHSA
GHSA-rr4q-h87q-gm3v: Inefficient Regular Expression Complexity (CWE-1333) in the AI Inference Anonymization Engine in Kibana can lead Denial of Service via Regular Express↗2026-02-26
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🕵️Threat Intelligence

1
Wiz
CVE-2026-26936 Impact, Exploitability, and Mitigation Steps | Wiz↗
▶
CVE-2026-26936 — Regex Denial of Service in Elastic | cvebase