Vulnerability Description
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/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.
Related Weaknesses (CWE)
References
- https://github.com/OpenSIPS/opensips/commit/8fe74b01f6fbf86c0b5e290735275530cb65
- https://github.com/OpenSIPS/opensips/commit/ac5309d5b8206cd3dbe1b4e01567c8db1ce3
- https://github.com/OpenSIPS/opensips/security/advisories/GHSA-rh36-mhpv-cx2r
- https://github.com/OpenSIPS/opensips/security/advisories/GHSA-rh36-mhpv-cx2r
FAQ
What is CVE-2026-46334?
CVE-2026-46334 is a documented vulnerability. 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 re...
How severe is CVE-2026-46334?
CVSS scoring is not yet available for CVE-2026-46334. Check NVD for updates.
Is there a patch for CVE-2026-46334?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.