HIGH

CVE-2026-46334

2026-08-05 CVSS v4.0

CVSS

8.7

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.

Weakness (CWE)

CWE-20 Improper Input Validation

CWE-476 NULL Pointer Dereference

EPSS Score

0.49%

Probability of exploitation in next 30 days

41.1th percentile

References

https://github.com/OpenSIPS/opensips/commit/8fe74b01f6fbf86c0b5e290735275530cb65e0fb https://github.com/OpenSIPS/opensips/commit/ac5309d5b8206cd3dbe1b4e01567c8db1ce31444 https://github.com/OpenSIPS/opensips/security/advisories/GHSA-rh36-mhpv-cx2r

View on dbcve.org

Base CVE data derived from NVD (public domain). Enrichment by dbcve.org (CC-BY-4.0). Fetched via API.

Back to CVE