Heap Out-of-Bounds Read Vulnerability in Sofia-SIP Affected by Remote Attacks
CVE-2026-110658

6.9MEDIUM

Key Information:

Vendor

Freeswitch

Status
Sofia-sip
Vendor
CVE Published:
14 October 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-110658?

Sofia-SIP versions prior to 1.13.18 are susceptible to a heap out-of-bounds read vulnerability found in the msg_multipart_parse() function. This flaw enables unauthenticated remote attackers to crash the Sofia-SIP process by supplying oversized MIME boundaries in an INVITE request. The vulnerable function fails to validate the boundary length, allowing an attacker to manipulate memory access through memcmp, ultimately leading to unintended crashes of the service.

Affected Version(s)

sofia-sip 0 <= 1.13.18

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-110658 - Proof of Concept

References

https://hackmd.io/@haind-pwn/sofia-sip-multipart-oob-read
technical-descriptionexploit
https://github.com/freeswitch/sofia-sip/blob/ad36ac8f7553...
technical-description
https://github.com/freeswitch/sofia-sip
product

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

HaiND from the Post and Telecommunication Institute of Technology
.