What is CVE-2025-68383?

CVE-2025-68383 is a medium-severity vulnerability in Elastic Filebeat, classified under Improper Validation of Specified Quantity in Input. CVSS score: 6.5/10. Published 2025-12-18.

How severe is CVE-2025-68383?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Elastic Filebeat

CVE-2025-68383

Improper Validation of Specified Index, Position, or Offset in Input (CWE-1285) in Filebeat Syslog parser and the Libbeat Dissect processor can allow a user to trigger a Buffer Overflow (CAPEC-100) and cause a denial of service (panic/crash) of the Filebeat process via either a malformed Syslog message or a malicious tokenizer pattern in the Dissect configuration.

EPSS: 0.002 (7.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Elastic Filebeat — versions 7.0.0, 8.0.0, 9.0.0

Weakness classification (CWE)

CWE-1284 — Improper Validation of Specified Quantity in Input

References

security@elastic.co (Vendor Advisory)

Frequently asked questions

What is CVE-2025-68383?: CVE-2025-68383 is a medium-severity vulnerability in Elastic Filebeat, classified under Improper Validation of Specified Quantity in Input. CVSS score: 6.5/10. Published 2025-12-18.
How severe is CVE-2025-68383?: Medium severity. CVSS v3 base score is 6.5 out of 10.