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Attributed metadata history

Δ / VULNERABILITY RECORD

CVE-2026-102408.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSMEDIUM / 4.3CVSS 3.1 · security@elastic.co
EXPLOITATION STATUSNo cached KEV assertionThe local KEV cache may be unavailable or incomplete; this does not establish absence of exploitation.
RECORD STATUSUndergoing AnalysisModified Oct 07, 2026

Disclosure summary

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.

Source-reported weakness categories

CWE-1333

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

NIST NVD · NVD-CVE-2026-102408

Open original source · Updated Oct 07, 2026

Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.

Original records & references

GitHub repository matches

Repository matches are links and GitHub-supplied metadata only. They are not verified working proof-of-concept code. Each supported query is bounded to ten pages and at most 1,000 indexed results. This is not a complete index of GitHub or public exploit research. Coverage can also be limited by provider availability, rate limits, rejected metadata, incomplete search results, manual review, and the recorded refresh time.

0 reviewed associations0 unverified candidates

No stored repository matches

Repository discovery has not recorded an update for this CVE yet.

Discovery progress

0 of 3 discovery queries finished. GitHub returned 0 indexed results; 0 malformed or disallowed results were rejected.

No discovery update has been recorded for this CVE.

View all 0 stored repository matches

PUBLISHED 2026-10-06T20:17:12+00:00
MODIFIED 2026-10-07T13:42:52+00:00
INGESTED 2026-10-11T00:50:03+00:00