---
id: CVE-2026-54632
title: 'SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET'
summary: >-
  SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to
  10.0.9, RTPChannel.OnRTPPacketReceived and the
  STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, and
  STUNAddressAttribute parsing path index untrusted b…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-20
  - CWE-755
vendor: sipsorcery-org
product: sipsorcery
affected:
  - sipsorcery < 10.0.9
patched:
  - SIPSorcery 10.0.9
published: '2026-09-14'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T15:17:18.310'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54632'
references:
  - url: >-
      https://github.com/sipsorcery-org/sipsorcery/commit/bdb76cbc0c7216e3126f743fb78e8525af56cea2
    label: security-advisories@github.com
  - url: 'https://github.com/sipsorcery-org/sipsorcery/pull/1677'
    label: security-advisories@github.com
  - url: >-
      https://github.com/sipsorcery-org/sipsorcery/security/advisories/GHSA-28gm-jrmw-xx93
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-28gm-jrmw-xx93'
tags:
  - nvd
  - cve.org
  - ghsa
  - nuget
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-15T14:43:20.756790Z'
epss: 0.00718
epssPercentile: 0.5194
aliases:
  - GHSA-28gm-jrmw-xx93
ecosystem: nuget
ingestedAt: '2026-07-28T17:37:22.254Z'
---

## Overview

SIPSorcery is a WebRTC, SIP, and VoIP library for C# and .NET. Prior to 10.0.9, RTPChannel.OnRTPPacketReceived and the STUNAttribute.ParseMessageAttributes, STUNXORAddressAttribute, and STUNAddressAttribute parsing path index untrusted bytes without sufficient length checks, while UdpReceiver.EndReceiveFrom closes the channel when those operations raise a non-socket exception. A remote party can send a single short RTP packet or malformed zero-to-seven-byte STUN address attribute to the shared RTP/ICE socket, including during ICE connectivity checks before DTLS or STUN MESSAGE-INTEGRITY verification, and terminate the active RTP or WebRTC media session. The attacker must reach or learn the advertised ephemeral RTP/ICE port, but no authentication or user interaction is required, and the impact is limited to availability. This issue is fixed in version 10.0.9.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-54632)

Affected packages:

- `SIPSorcery <= 10.0.8`

Patched in:

- `SIPSorcery 10.0.9`

Source: https://github.com/advisories/GHSA-28gm-jrmw-xx93