---
id: "CVE-2026-112690"
kind: "vulnerability"
aliases: ["CVE-2026-112690"]
title: "Apple WebKit: input validation flaw lets remote attacker escape WebContent sandbox"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["apple", "infrastructure", "ios", "ipados", "macos", "safari", "visionos", "webkit"]
not_affected_if: ["already-patched"]
published_at: "2026-10-26T21:18:03+00:00"
first_seen_at: "2026-10-26T21:20:30+00:00"
updated_at: "2026-10-26T21:23:25+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-112690", "first_seen_at": "2026-10-26T21:20:30+00:00"}]
---

# Apple WebKit: input validation flaw lets remote attacker escape WebContent sandbox

Apple patched an input validation flaw in its operating systems that lets a remote attacker break out of the WebContent sandbox used by Safari and other WebKit-based views. The sources do not give a CVSS score or say whether the flaw is exploited.

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

## How to check

- Check the installed iOS, iPadOS, macOS or visionOS version under Settings > General > About (or `sw_vers` on macOS) and compare it to the fixed releases.
- unknown for any other check, as the sources give no configuration details.

## Fix

- Update iOS and iPadOS to `26.7.2` or `27.2`.
- Update macOS Tahoe to `26.7.2`, macOS Sequoia to `15.8.2`, and macOS Golden Gate to `27.2`.
- Update visionOS to `27.2`.

## Timeline

- 2026-10-26T21:20:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-112690

## From the sources

This issue was addressed with improved input validation. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2, iOS 27.2 and iPadOS 27.2, macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2, visionOS 27.2. A remote attacker may be able to break out of the WebContent sandbox.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_