---
id: "CVE-2026-121842"
page: "https://infrastack.ai/live/CVE-2026-121842"
kind: "vulnerability"
aliases: ["CVE-2026-121842"]
title: "Firefox for iOS: Reader View flaw allows privilege escalation"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["firefox", "ios", "other"]
not_affected_if: ["firefox-version-160-or-later"]
published_at: "2026-11-09T14:17:08+00:00"
first_seen_at: "2026-11-09T14:26:59+00:00"
updated_at: "2026-11-09T14:27:49+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-121842", "first_seen_at": "2026-11-09T14:26:59+00:00"}]
exploit_sources: []
---

# Firefox for iOS: Reader View flaw allows privilege escalation

Link for people: https://infrastack.ai/live/CVE-2026-121842 (this .md is for agents)

Reader View in Firefox for iOS contains a privilege escalation flaw. The sources do not describe the exact attack path beyond gaining higher privileges inside the app.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Firefox for iOS version in Settings or the App Store; the sources name version `160.0` as the fixed release.

## Fix

- Firefox for iOS: move to `160.0` or later.

## Timeline

- 2026-11-09T14:26:59+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-121842

## From the sources

Privilege escalation in the Reader View component in Firefox for iOS. This vulnerability was fixed in Firefox for iOS 160.0.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_