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 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-2026-52919

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...

PT-2026-67894

Name of the Vulnerable Software and Affected Versions OpenSIPS versions prior to 3.6.6 OpenSIPS versions prior to 4.0.0-rc1 Description A denial of service issue exists in the watcherinfo generation functionality. A remote attacker can crash an OpenSIPS worker by sending a SUBSCRIBE Event: presen...

PT-2026-67879

Name of the Vulnerable Software and Affected Versions OpenSIPS versions 3.4.0-beta through 3.6.5 OpenSIPS version 4.0.0-beta Description A buffer overflow exists in the s.b64encode string transformation. The size check only verifies that the input fits within the 64 KB transformation buffer,...

PT-2026-67890

Name of the Vulnerable Software and Affected Versions OpenSIPS versions prior to 3.6.6 OpenSIPS versions prior to 4.0.0-rc1 Description The construct uri function concatenates URI components including protocol, username, domain, port, and params into a fixed 1024-byte global BSS buffer without...

PT-2026-67851

Name of the Vulnerable Software and Affected Versions OpenSIPS versions prior to 4.0.1 Description A stack buffer overflow occurs when processing a SIP message containing a header name longer than 255 bytes. This happens when the routing script calls the sip to json function, which copies header...

CVE-2026-45100: Buffer Copy without Checking Size of Input

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...

PT-2026-67897

Name of the Vulnerable Software and Affected Versions OpenSIPS versions prior to 3.6.6 OpenSIPS versions prior to 4.0.0-rc1 Description A denial of service issue exists in the SDP bandwidth-line parsing logic. An unauthenticated remote attacker can send a SIP request with Content-Type:...

CVE-2026-45538: Stack-based Buffer Overflow

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-2026-45537: Buffer Copy without Checking Size of Input

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-2026-45103: Integer Overflow or Wraparound

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-2026-45084: NULL Pointer Dereference

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...

PT-2026-67893

Name of the Vulnerable Software and Affected Versions OpenSIPS versions prior to 3.6.6 OpenSIPS versions prior to 4.0.0-rc1 Description The find line delimiter function in the multipart body parser performs an out-of-bounds read via strncmp when searching for MIME boundary delimiters. This occurs...

PT-2026-67880

Name of the Vulnerable Software and Affected Versions OpenSIPS versions prior to 3.6.6 OpenSIPS versions prior to 4.0.0-rc1 Description The TCP message framing layer parses the Content-Length header using unsigned int arithmetic without overflow checks. An unauthenticated, network-based attacker...

PT-2026-67865

Name of the Vulnerable Software and Affected Versions OpenSIPS versions 3.4.0 through 3.6.5 Description A denial of service issue exists in the presence module of this Session Initiation Protocol SIP server. When the handle publish function processes a SIP PUBLISH request containing an Event:...

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: Improper Neutralization of Special Elements used in an SQL Command

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...