UpHeron
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Servers and applications

CVE-2026-102408

Inefficient Regular Expression Complexity (CWE-1333) in Elasticsearch can lead to denial of service via Regular Expression Exponential Blowup (CAPEC-492). The ES|QL CHUNK function's recursive chunking strategy accepts a list of user-supplied regular expressions used as text-splitting separators, without validating their computational complexity or bounding their execution time. An authenticated…

Severity
Medium 4.3
Published
6 Oct 2026
Last changed
13 Oct 2026
Added to UpHeron
21 Oct 2026
Fixed in
8.19.22, 9.4.8, 9.5.5
Sources
NVD

Affected software

SoftwareAffected versions
ElasticsearchServers and applications · cpe:a:elastic:elasticsearch
  • From 8.19.0 before 8.19.22
  • From 9.1.0 before 9.4.8
  • From 9.5.0 before 9.5.5

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2026-102408
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2026-102408