CVE-2026-90778 SIPp - Buffer Overflow

SIPp <= 3.7.7 contains a buffer overflow caused by processing SIP To headers with tag parameters of 2049 bytes or more in get_peer_tag() function, letting unauthenticated remote attackers crash the process.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.86% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Buffer Overflow
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
13 September 2026
Updated
15 October 2026
Weakness
CWE-120

Vendor fix

Update to the latest version of SIPp.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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