{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-20019 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-20019 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-20019 is a medium-severity vulnerability in Cisco Open Source Snort3, published on 21 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-20019 and fix it if it is affected.\n\nWhat it is: CVE-2026-20019 is a medium-severity vulnerability in Cisco Open Source Snort3, published on 21 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-20019 in the wild and no public exploit code.\n\nAffected product: Cisco Open Source Snort3. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-20019/ (Markdown: https://insights.sbomify.com/CVE-2026-20019/index.md)","id":"CVE-2026-20019","markdown":"https://insights.sbomify.com/CVE-2026-20019/index.md","name":"CVE-2026-20019","record":{"aliases":["GHSA-pqhw-xr48-3362"],"analysis":null,"analysis_generated_by":null,"assigner":"cisco","cpe":[],"cvss":{"score":5.8,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"}],"description":"Multiple Cisco products are affected by a vulnerability in the Snort 3 NetFlow Detection Engine that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart, resulting in an interruption of packet inspection.\r\n\r\nThis vulnerability is due to incomplete error checking when Snort 3 parses UDP Netflow Protocol packets. An attacker could exploit this vulnerability by sending a single crafted Netflow packet through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause the Snort 3 Detection Engine to restart unexpectedly, resulting in a DoS condition.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Multiple Cisco Products Snort 3 Netflow Denial of Service Vulnerabilities","id":"CVE-2026-20019","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":null,"year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Denial of service in Cisco Secure Firewall Adaptive Security Appliance (ASA) Software","id":"CVE-2026-20020"},"packages":[],"prev":{"headline":"Cisco Firepower Management Center Software and Firepower Threat Defense Path Traversal Vulnerability","id":"CVE-2026-20018"},"products":["Cisco Open Source Snort3","Cisco Secure Firewall Threat Defense (FTD) Software","Cisco UTD SNORT IPS Engine Software"],"published":"2026-10-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-10-22","vendors":["Cisco"]},"summary":null,"url":"https://insights.sbomify.com/CVE-2026-20019/"}