---
id: CVE-2026-118179
title: 'Request forgery via news: links'
summary: >-
  Clicking a news: or snews: link that referenced a message-ID made Thunderbird
  connect, without asking, to the host and port given in the link, even if it
  was not a configured news server. Line breaks in the message-ID were sent to
  the se…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cvssSource: adp
vendor: Mozilla
product: Thunderbird
affected:
  - Thunderbird
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-11-04T16:43:19.420741Z'
published: '2026-10-27'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T16:44:03.131Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-118179'
references:
  - url: 'https://bugzilla.mozilla.org/show_bug.cgi?id=2077789'
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-121/'
  - url: 'https://www.mozilla.org/security/advisories/mfsa2026-122/'
tags:
  - cve.org
epss: 0.00179
epssPercentile: 0.07577
ingestedAt: '2026-10-27T18:52:10.019Z'
---

## Overview

Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host and port given in the link, even if it was not a configured news server. Line breaks in the message-ID were sent to the server unmodified, so a crafted link could send arbitrary commands to services reachable from the user's network. In addition, snews: links to such servers connected without TLS. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.

## Affected

- `Thunderbird`

## Remediation

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