Uncontrolled Recursion (CWE-674) in the Elasticsearch wildcard matching helper can lead to a denial of service via Excessive Allocation (CAPEC-130). The matcher used to resolve wildcard patterns against names is implemented recursively and had no bound on recursion depth or on the total number of match operations performed. A search request containing a wildcard pattern with a large number of wildcard groups, evaluated against a sufficiently long name, exhausts the thread stack. Elasticsearch treats a stack overflow as an unrecoverable condition and shuts the node down, so the request terminates the affected node rather than failing gracefully.
Metrics
Affected Vendors & Products
References
History
Thu, 13 Aug 2026 21:30:00 +0000
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ssvc
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Thu, 13 Aug 2026 21:15:00 +0000
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Elastic
Elastic elasticsearch |
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| Vendors & Products |
Elastic
Elastic elasticsearch |
Thu, 13 Aug 2026 19:30:00 +0000
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| Description | Uncontrolled Recursion (CWE-674) in the Elasticsearch wildcard matching helper can lead to a denial of service via Excessive Allocation (CAPEC-130). The matcher used to resolve wildcard patterns against names is implemented recursively and had no bound on recursion depth or on the total number of match operations performed. A search request containing a wildcard pattern with a large number of wildcard groups, evaluated against a sufficiently long name, exhausts the thread stack. Elasticsearch treats a stack overflow as an unrecoverable condition and shuts the node down, so the request terminates the affected node rather than failing gracefully. | |
| Title | Uncontrolled Recursion in Elasticsearch Wildcard Matching Leading to Denial of Service | |
| Weaknesses | CWE-674 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: elastic
Published:
Updated: 2026-08-13T20:26:48.047Z
Reserved: 2026-08-10T11:17:29.887Z
Link: CVE-2026-72636
Updated: 2026-08-13T20:26:43.223Z
Status : Received
Published: 2026-08-13T20:17:24.187
Modified: 2026-08-13T21:18:09.160
Link: CVE-2026-72636
No data.
OpenCVE Enrichment
Updated: 2026-08-13T21:00:06Z