Is CVE-2026-90779 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-90779?

CVE-2026-90779 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-90779

Description

SIPp through 3.7.7 contains a stack buffer overflow vulnerability in createAuthHeader() when processing SIP authentication challenges with oversized algorithm parameters. A malicious SIP server can send a crafted 401 or 407 challenge to corrupt the stack and crash the client process.