{"id":"CVE-2026-106803","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-106803","generatedAt":"2026-11-04T11:49:47.749Z","title":"A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module.","description":"A stack-based buffer overflow exists in Kamailio v6.1.3 and v6.1.4 in the ims_registrar_pcscf module. When processing a crafted application/reginfo+xml NOTIFY message, process_contact() copies an attacker-controlled port value from the alias parameter into a fixed 5-byte stack buffer without validating its length. An unauthenticated remote attacker can trigger stack corruption and terminate the P-CSCF process, resulting in denial of service.","published":"2026-11-02T17:17:33.000Z","lastModified":"2026-11-03T14:17:17.000Z","status":"Awaiting Analysis","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-121"],"affected":[],"epss":{"score":0.00285,"percentile":0.211,"date":"2026-11-03","history":[{"date":"2026-11-03","score":0.00285,"percentile":0.211}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-11-03T14:32:42.000Z","detail":{"from":null,"score":"9.8","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.8 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-11-02T17:17:33.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-11-02T17:17:33.270Z"},"summary":"New CVE, critical severity (CVSS 9.8)."}],"references":[{"url":"https://gist.github.com/hackeryounow/7d7ccc9ec501a5d8c9143b2e1bcc11cb","source":"cve@mitre.org"},{"url":"https://github.com/kamailio/kamailio/commit/21261436492f0014930e804e20586e3833bb91b9","source":"cve@mitre.org"},{"url":"https://github.com/kamailio/kamailio/issues/4954","source":"cve@mitre.org"},{"url":"https://github.com/kamailio/kamailio/pull/4958","source":"cve@mitre.org"},{"url":"https://github.com/kamailio/kamailio/issues/4954","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-106803","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}