{"cve":"CVE-2026-26933","nvd":{"published":"2026-03-19T18:16:21.497","modified":"2026-06-17T10:26:24.710","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.7},"cwes":["CWE-129"],"references":["https://discuss.elastic.co/t/packetbeat-8-19-11-9-2-5-security-update-esa-2026-11/385533"],"products":["elasticsearch:packetbeat"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-26933","score":0.00251,"percentile":0.16546,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-27qj-9gvp-8rh9","url":"https://osv.dev/vulnerability/GHSA-27qj-9gvp-8rh9","summary":"Packetbeat does not properly validate an array index in multiple protocol parser components","modified":"2026-09-10T03:50:36.274896332Z","packages":[{"ecosystem":"Go","name":"github.com/elastic/beats/v7","purl":"pkg:golang/github.com/elastic/beats/v7","ranges":["<7.0.0-alpha2.0.20260126223743-dec1b31111ec"],"fixed":["7.0.0-alpha2.0.20260126223743-dec1b31111ec"]}]},{"id":"GO-2026-4789","url":"https://osv.dev/vulnerability/GO-2026-4789","summary":"Packetbeat does not properly validate an array index in multiple protocol parser components in github.com/elastic/beats","modified":"2026-05-13T03:44:32.397322419Z","packages":[{"ecosystem":"Go","name":"github.com/elastic/beats","purl":"pkg:golang/github.com/elastic/beats","ranges":["all versions"],"fixed":[]},{"ecosystem":"Go","name":"github.com/elastic/beats/v7","purl":"pkg:golang/github.com/elastic/beats/v7","ranges":["<7.0.0-alpha2.0.20260126223743-dec1b31111ec"],"fixed":["7.0.0-alpha2.0.20260126223743-dec1b31111ec"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}