CVE-2026-45103

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions prior to 3.6.6 and 4.0.0-rc1, the TCP message framing layer parses the Content-Length header using unsigned int arithmetic with no overflow check. When an attacker sends a Content-Length value that overflows unsigned...

CVE-2026-45103 OpenSIPS: SIP Message Smuggling via TCP Content-Length Integer Overflow

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions prior to 3.6.6 and 4.0.0-rc1, the TCP message framing layer parses the Content-Length header using unsigned int arithmetic with no overflow check. When an attacker sends a Content-Length value that overflows unsigned...

CVE-2026-45100 OpenSIPS: Buffer Overflow in Base64 Encode Transformation

OpenSIPS is a Session Initiation Protocol SIP server implementation. Versions 3.4.0-beta through 3.6.5 and 4.0.0-beta contain a buffer overflow in the s.b64encode string transformation. The size check for s.b64encode only verifies that the input fits within the 64 KB transformation buffer, but...

CVE-2026-45100 OpenSIPS: Buffer Overflow in Base64 Encode Transformation

OpenSIPS is a Session Initiation Protocol SIP server implementation. Versions 3.4.0-beta through 3.6.5 and 4.0.0-beta contain a buffer overflow in the s.b64encode string transformation. The size check for s.b64encode only verifies that the input fits within the 64 KB transformation buffer, but...

CVE-2026-45100

OpenSIPS contains a buffer overflow in the s.b64encode transformation affecting versions 3.4.0-beta through 3.6.5 and 4.0.0-beta. The 64 KB transformation buffer is overflowed because base64 encoding expands input by ~33%, so inputs around 49,153–65,535 bytes can overflow and overwrite adjacent m...

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...

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...

CVE-2026-45084

OpenSIPS vulnerability CVE-2026-45084 affects versions 3.4.0–3.6.5 in the presence module. When processing a SIP PUBLISH with Event: presence and a body, if enable_sphere_check=1 is set, handle_publish() calls get_content_type() before parse_content_type_hdr(), dereferencing msg->content_type-...

CVE-2026-45084

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...

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...

CVE-2026-45538

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions 4.0.0 and prior, processing a SIP message with a header name longer than 255 bytes causes a stack buffer overflow when siptojson is called in the routing script. Function siptojson modules/sipmsgops/sipmsgops.c copie...

CVE-2026-45538

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions 4.0.0 and prior, processing a SIP message with a header name longer than 255 bytes causes a stack buffer overflow when siptojson is called in the routing script. Function siptojson modules/sipmsgops/sipmsgops.c copie...

CVE-2026-45538 OpenSIPS: Stack Buffer Overflow in sip_to_json() Header Name Copy

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions 4.0.0 and prior, processing a SIP message with a header name longer than 255 bytes causes a stack buffer overflow when siptojson is called in the routing script. Function siptojson modules/sipmsgops/sipmsgops.c copie...

CVE-2026-45538 OpenSIPS: Stack Buffer Overflow in sip_to_json() Header Name Copy

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions 4.0.0 and prior, processing a SIP message with a header name longer than 255 bytes causes a stack buffer overflow when siptojson is called in the routing script. Function siptojson modules/sipmsgops/sipmsgops.c copie...

CVE-2026-45538

OpenSIPS prior to 4.0.0 is vulnerable to a stack buffer overflow in sip_to_json() when processing a SIP header name longer than 255 bytes. The function copies header names into a fixed 255-byte stack buffer without bounds checking, even though header names can be ~65,000 bytes. A routing script t...

CVE-2026-45538 OpenSIPS: Stack Buffer Overflow in sip_to_json() Header Name Copy

OpenSIPS is a Session Initiation Protocol SIP server implementation. In versions 4.0.0 and prior, processing a SIP message with a header name longer than 255 bytes causes a stack buffer overflow when siptojson is called in the routing script. Function siptojson modules/sipmsgops/sipmsgops.c copie...

EUVD-2026-36748

A Time-Based Blind SQL Injection vulnerability in the aliasmanagement module of OpenSIPS Control Panel opensips-cp prior to version 9.3.3 allows authenticated attackers to execute arbitrary SQL commands via the 'table' GET parameter in aliasmanagement.php...

CVE-2026-36670

A Time-Based Blind SQL Injection vulnerability in the aliasmanagement module of OpenSIPS Control Panel opensips-cp prior to version 9.3.3 allows authenticated attackers to execute arbitrary SQL commands via the 'table' GET parameter in aliasmanagement.php...

PT-2026-49288

Name of the Vulnerable Software and Affected Versions OpenSIPS Control Panel versions prior to 9.3.3 Description A Time-Based Blind SQL Injection in the alias management module allows authenticated attackers to execute arbitrary SQL commands. This occurs via the 'table' GET parameter in the 'alia...

CVE-2026-36670

CVE-2026-36670: Time-based blind SQL injection in the OpenSIPS Control Panel (opensips-cp) alias_management module before version 9.3.3. Authenticated attackers can leverage the table parameter in alias_management.php to execute arbitrary SQL. Connected sources confirm the affected component is O...