EUVD-2026-53010

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 t...

CVE-2026-45705

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions prior to 3.6.6 and 4.0.0-rc1, the findlinedelimiter function in the multipart body parser performs an out-of-bounds read via strncmp when searching for MIME boundary delimiters. After finding a -- pattern near the en...

CVE-2026-45537 OpenSIPS: Global Buffer Overflow in construct_uri

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions prior to 3.6.6 and 4.0.0-rc1, the constructuri function concatenates multiple URI components protocol, username, domain, port, params into a fixed 1024-byte global BSS buffer without any bounds checking. When a routi...

CVE-2026-45537 OpenSIPS: Global Buffer Overflow in construct_uri

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions prior to 3.6.6 and 4.0.0-rc1, the constructuri function concatenates multiple URI components protocol, username, domain, port, params into a fixed 1024-byte global BSS buffer without any bounds checking. When a routi...

CVE-2026-45084 OpenSIPS: Denial of service in presence.handle_publish() from unchecked Content-Type state

OpenSIPS is a Session Initiation Protocol SIP server implementation. Versions 3.4.0 through 3.6.5 contain a denial of service vulnerability in the presence module. When the presence module's handlepublish function processes a SIP PUBLISH request with an Event: presence header and a message body...