{"id":"CVE-2026-46334","title":"OpenSIPS is a Session Initiation Protocol (SIP) server implementation","summary":"OpenSIPS is a Session Initiation Protocol (SIP) server implementation. Versions prior to 3.6.6 and 4.0.0-rc1 contain a denial of service vulnerability in the SDP bandwidth-line parsing logic. A SIP request with Content-Type: application/…","severity":"none","cwe":["CWE-20","CWE-476"],"published":"2026-08-05","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:41:31.497","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-46334","references":[{"url":"https://github.com/OpenSIPS/opensips/commit/8fe74b01f6fbf86c0b5e290735275530cb65e0fb","label":"security-advisories@github.com"},{"url":"https://github.com/OpenSIPS/opensips/commit/ac5309d5b8206cd3dbe1b4e01567c8db1ce31444","label":"security-advisories@github.com"},{"url":"https://github.com/OpenSIPS/opensips/security/advisories/GHSA-rh36-mhpv-cx2r","label":"security-advisories@github.com"},{"url":"https://github.com/OpenSIPS/opensips/security/advisories/GHSA-rh36-mhpv-cx2r","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00488,"epssPercentile":0.40999,"ingestedAt":"2026-09-08T21:11:12.267Z","slug":"CVE-2026-46334","body":"## Overview\n\nOpenSIPS is a Session Initiation Protocol (SIP) server implementation. Versions prior to 3.6.6 and 4.0.0-rc1 contain a denial of service vulnerability in the SDP bandwidth-line parsing logic. A SIP request with Content-Type: application/sdp and a malformed session-level SDP bandwidth line missing the required colon delimiter can corrupt parsed SDP bandwidth metadata. When a route or module subsequently clones the corrupted SDP state, as occurs with dialog and QoS processing, the OpenSIPS worker process crashes. An unauthenticated remote attacker can therefore trigger a crash in any configuration whose routing script parses attacker-controlled SDP and applies dialog/QoS processing. This issue has been fixed in versions 3.6.6 and 4.0.0-rc1.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}