Multiple security vulnerabilities have been identified in Snort 3 Detection Engine implementations used by multiple network security products. The flaws affect deployments configured to parse Netflow Protocol connections and can allow an unauthenticated remote attacker to trigger an unexpected engine restart. The overall risk is a denial of service condition, and affected components include detection engine processing paths that handle Netflow data.
CVE-2026-20019, CVE-2026-20179, CVE-2026-20197, CVE-2026-76489: This vulnerability is a denial-of-service flaw in the Snort 3 Detection Engine's handling of Netflow Protocol connections, where an unauthenticated remote attacker can cause the engine to restart unexpectedly.[/subscribe_to_unlock_form]
Multiple security vulnerabilities have been identified in Snort 3 Detection Engine implementations used by multiple network security products. The flaws affect deployments configured to parse Netflow Protocol connections and can allow an unauthenticated remote attacker to trigger an unexpected engine restart. The overall risk is a denial of service condition, and affected components include detection engine processing paths that handle Netflow data.
CVE-2026-20019, CVE-2026-20179, CVE-2026-20197, CVE-2026-76489: This vulnerability is a denial-of-service flaw in the Snort 3 Detection Engine's handling of Netflow Protocol connections, where an unauthenticated remote attacker can cause the engine to restart unexpectedly.[emaillocker id="1283"]
These vulnerabilities collectively present a denial-of-service risk for deployments that rely on the affected detection engine for traffic inspection. The most exposed environments are those configured to parse Netflow Protocol connections and reachable by unauthenticated remote attackers. Organizations should prioritize exposure assessment and operational monitoring for affected detection engine configurations.
The following reports contain further technical details:
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