Medium severity · published Jan 14, 2026
CVE-2026-0529
Improper Validation of Array Index in Packetbeat Leading to Overflow Buffers
6.5
CVSS
0.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 13% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
Packetbeat · Elastic
7.0.0 through 7.17.29; 8.0.0 through 8.19.9; 9.0.0 through 9.1.9; 9.2.0 through 9.2.3 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0529
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-0529
discuss.elastic.co
https://discuss.elastic.co/t/packetbeat-8-19-10-9-1-10-9-2-4-security-update-esa-2026-02/384520
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