CVE-2026-90778

SIPp through 3.7.7 contains a buffer overflow vulnerability in get_peer_tag() function when processing SIP To headers with tag parameters of 2049 bytes or more. Unauthenticated remote attackers can send crafted SIP messages with oversized tag parameters to overflow the static buffer and crash the process.

  • Published Sep 13, 2026
  • CVSS 8.7 high
  • 0.9% chance of exploitation in the next 30 days (EPSS)
  • A fix is available

Affected software

CVE-2026-90778 at the National Vulnerability Database