CVE-2026-103005CWE-789

CVE-2026-103005

Medium · published October 7, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
22.5
In the wild
Unconfirmed
What it is

Memory Allocation with Excessive Size Value (CWE-789) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user with connector management privileges could cause the cluster to allocate an uncontrolled amount of memory when connector resources with an excessively large `description` field are created and subsequently accessed, exhausting available heap memory and crashing the affected node.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00309 · 22.5th percentile
Weakness
CWE-789 · Memory Allocation with Excessive Size Value
Published
2026-10-07T00:17Z
Affected products (4)
ProductVersionsFixed in
elastic/elasticsearch≥ 8.12.0, < 8.19.238.19.23
elastic/elasticsearch≥ 9.0.0, ≤ 9.3.8—
elastic/elasticsearch≥ 9.4.0, < 9.4.89.4.8
elastic/elasticsearch≥ 9.5.0, < 9.5.59.5.5
References (1)
https://discuss.elastic.co/t/elasticsearch-8-19-23-9-4-8-9-5-5-security-update-esa-2026-195/390869 · [email protected]
EPSS history
Timeline
  • 08 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 06 OCT 19:31Z
    Memory Allocation with Excessive Size Value in Elasticsearch Leading to Denial of Service
    cvelistv5