Buffer Overflow Vulnerability in SIPp Product by SIPp Vendor
CVE-2026-90778

8.7HIGH

Key Information:

Vendor

Sipp

Status
Sipp
Vendor
CVE Published:
13 September 2026

What is CVE-2026-90778?

The SIPp product version 3.7.7 is vulnerable due to a buffer overflow in the get_peer_tag() function. This issue arises when processing SIP To headers containing tag parameters of 2049 bytes or more. Unauthenticated remote attackers can exploit this vulnerability by sending maliciously crafted SIP messages with oversized tag parameters, leading to a potential overflow of the static buffer, which can crash the process and disrupt service.

Affected Version(s)

sipp 0 <= 3.7.7

References

https://github.com/SIPp/sipp/pull/879
patchissue-tracking
https://github.com/SIPp/sipp/commit/ddf22d1a54e0396b2e18e...
patch
https://github.com/SIPp/sipp/blob/v3.7.7/src/sip_parser.c...
technical-description

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Tristan Madani
.