CVE-2026-26933Medium· 5.7▾ SunlitPacketbeat does not properly validate an array index in multiple protocol parser components
▾ Sunlit zone — Low / medium · no exploitation signal
impact 31.4 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.2%
Improper Validation of Array Index (CWE-129) in multiple protocol parser components in Packetbeat can lead Denial of Service via Input Data Manipulation (CAPEC-153). An attacker with the ability to send specially crafted, malformed network packets to a monitored network interface can trigger out-of-bounds read operations, resulting in application crashes or resource exhaustion. This requires the attacker to be positioned on the same network segment as the Packetbeat deployment or to control traffic routed to monitored interfaces.
github.com/elastic/beats/v7 < 7.0.0-alpha2.0.20260126223743-dec1b31111ecUpgrade to a patched release:
github.com/elastic/beats/v7 7.0.0-alpha2.0.20260126223743-dec1b31111ecConnected by shared product, vendor, weakness, or advisory.
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