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Tue, 06 Oct 2026 20:30:00 +0000
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ssvc
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Tue, 06 Oct 2026 19:45:00 +0000
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| Description | 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 user with read access to any text-based index can submit a specially crafted regular expression that triggers catastrophic backtracking, consuming excessive CPU on Elasticsearch worker threads and degrading query throughput for other tenants on the affected node. The cluster does not crash as a result of this issue. | |
| Title | Inefficient Regular Expression Complexity in Elasticsearch Leading to Denial of Service | |
| Weaknesses | CWE-1333 | |
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| Metrics |
cvssV3_1
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Subscriptions
No data.
Status: PUBLISHED
Assigner: elastic
Published:
Updated: 2026-10-06T19:56:06.441Z
Reserved: 2026-09-29T02:06:02.426Z
Link: CVE-2026-102408
Updated: 2026-10-06T19:56:00.587Z
Status : Received
Published: 2026-10-06T20:17:12.777
Modified: 2026-10-06T20:17:12.777
Link: CVE-2026-102408
No data.
OpenCVE Enrichment
Updated: 2026-10-06T20:45:06Z