Is CVE-2026-90778 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-90778?

CVE-2026-90778 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-90778

Description

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.