CVE-2025-68383 is a medium-severity (CVSS 6.5) CWE-1284 vulnerability in github.com/elastic/beats/v7. A fix is available for github.com/elastic/beats/v7 — see the affected versions and patch details below.
Filebeat Beats has Buffer Overflow via Malformed Syslog Message or Malicious Tokenizer Pattern in Dissect Configuration
Exploitation Status
No confirmed exploitation observed yet
- CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.
Exploitation and automatability from CISA’s SSVC triage for CVE-2025-68383.
EPSS Exploitation Probability
Probability of exploitation in the next 30 days, from FIRST.org EPSS.
How urgent is this, really
Where this sits among everything scored
Real-World Exposure
github.com/elastic/beats/v7🐹github.com/elastic/beats/v7🐹github.com/elastic/beats/v7🐹github.com/elastic/beats/v7🐹github.com/elastic/beatsReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
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.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/elastic/beats/v7 | ≥ 7.7.0&&< 8.19.9 | 8.19.9go get github.com/elastic/beats/v7@v8.19.9 |
| 🐹Go | github.com/elastic/beats/v7 | ≥ 9.0.0&&< 9.1.9 | 9.1.9go get github.com/elastic/beats/v7@v9.1.9 |
| 🐹Go | github.com/elastic/beats/v7 | ≥ 9.2.0&&< 9.2.3 | 9.2.3go get github.com/elastic/beats/v7@v9.2.3 |
| 🐹Go | github.com/elastic/beats/v7 | all versions | 7.0.0-alpha2.0.20251204214633-dd3af18220bfgo get github.com/elastic/beats/v7@v7.0.0-alpha2.0.20251204214633-dd3af18220bf |
| 🐹Go | github.com/elastic/beats | all versions | No fix |
Affected Products
filebeatelasticDetection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/elastic/beats/v7, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update github.com/elastic/beats/v7 to 8.19.9 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2025-68383 is resolved across your whole dependency graph.
Workarounds
Stop feeding it untrusted input: reject or quarantine files and payloads from unverified sources until you can upgrade, restrict accepted formats to the ones you actually need, and run the parsing or decoding step in a least-privileged sandbox or short-lived worker so a crash or corrupted read cannot reach the rest of the process.
Frequently Asked Questions
Is CVE-2025-68383 in your dependencies?
Find it across Go, including transitive dependencies.