CVE-2026-0529 Improper Validation of Array Index in Packetbeat Leading to Overflow Buffers
An attacker can cause a buffer overflow and denial of service in Packetbeat by sending malformed MongoDB traffic to a monitored interface.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-0529?
CVE-2026-0529 is a medium-severity vulnerability in Elastic Packetbeat, published on 14 Jan 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Improper Validation of Array Index (CWE-129) in Packetbeat’s MongoDB protocol parser can allow an attacker to cause Overflow Buffers (CAPEC-100) through specially crafted network traffic. This requires an attacker to send a malformed payload to a monitored network interface where MongoDB protocol parsing is enabled.
Weakness: CWE-129
Which versions are affected by CVE-2026-0529?
How do I fix CVE-2026-0529?
No fix has been published for CVE-2026-0529 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-0529 being exploited?
There is no known exploitation of CVE-2026-0529 in the wild and no public exploit code.
Sources
Also known as GHSA-c27p-chmh-jjv6.