{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2026-20011 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-20011 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-20011 is a medium-severity vulnerability in Cisco Open Source Snort3, published on 21 Oct 2026."},"fix_prompt":"Check this codebase for CVE-2026-20011 and fix it if it is affected.\n\nWhat it is: CVE-2026-20011 is a medium-severity vulnerability in Cisco Open Source Snort3, published on 21 Oct 2026. \nExploitation: There is no known exploitation of CVE-2026-20011 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-2026-20011/ (Markdown: https://insights.sbomify.com/CVE-2026-20011/index.md)","id":"CVE-2026-20011","markdown":"https://insights.sbomify.com/CVE-2026-20011/index.md","name":"CVE-2026-20011","record":{"aliases":["GHSA-mj78-cj39-7cv9"],"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-805","name":"Buffer Access with Incorrect Length Value"}],"description":"Multiple Cisco products are affected by a vulnerability in the Snort 3 SMTP MIME Decoder that could allow an unauthenticated, remote attacker to cause the Snort 3 Detection Engine to restart.\r\n\r\nThis vulnerability is due to a lack of error checking when the MIME fields of the SMTP header are parsed. An attacker could exploit this vulnerability by sending crafted SMTP packets through an established connection to be parsed by Snort 3. A successful exploit could allow the attacker to cause a denial of service (DoS) condition when the Snort 3 Detection Engine unexpectedly restarts.","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 SMTP MIME Denial of Service Vulnerability","id":"CVE-2026-20011","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 IOS XE Software","id":"CVE-2026-20012"},"packages":[],"prev":{"headline":"Cisco Nexus 3000 and 9000 Series Switches Link Layer Discovery Protocol Denial of Service Vulnerability","id":"CVE-2026-20010"},"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-2026-20011/"}