CVE-2026-26933 is an Improper Validation of Array Index vulnerability (CWE-129) affecting multiple protocol parser components within Packetbeat. This flaw allows an attacker to trigger Denial of Service via Input Data Manipulation. An attacker on the same network segment can send specially crafted, malformed network packets, leading to out-of-bounds read operations and subsequent application crashes or resource exhaustion. Rated 5.7 Medium severity (CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H), it requires adjacent network access with low privileges and low attack complexity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion for this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 8.0.0, <= 8.19.10CPE match | cpe:2.3:a:elasticsearch:packetbeat:*:*:*:*:*:*:*:* | ||
>= 9.0.0, <= 9.2.4CPE match | cpe:2.3:a:elasticsearch:packetbeat:*:*:*:*:*:*:*:* | ||
>= 8.0.0, < 8.19.11CPE matchmatch criteria | cpe:2.3:a:elasticsearch:packetbeat:*:*:*:*:*:*:*:* | ||
>= 9.0.0, < 9.2.5CPE matchmatch criteria | cpe:2.3:a:elasticsearch:packetbeat:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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