# CVE-2019-8506: Apple Multiple Products Type Confusion

> Attackers can execute arbitrary code by tricking users into visiting malicious web content in Safari or related Apple applications.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Yes, since 4 May 2022 (CISA KEV)
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 18 Dec 2019
- **Updated:** 21 Oct 2025
- **Also known as:** DEBIAN-CVE-2019-8506, GHSA-fg7h-q67h-82rg, UBUNTU-CVE-2019-8506

## What is CVE-2019-8506?

CVE-2019-8506 is a high-severity memory corruption vulnerability in Apple Icloud, published on 18 Dec 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A type confusion issue was addressed with improved memory handling. This issue is fixed in iOS 12.2, tvOS 12.2, watchOS 5.2, Safari 12.1, iTunes 12.9.4 for Windows, iCloud for Windows 7.11. Processing maliciously crafted web content may lead to arbitrary code execution.

Weakness: CWE-843 (Access of Resource Using Incompatible Type)

## Which versions are affected by CVE-2019-8506?

It affects 9 products.


Products: Apple Icloud, Apple Iphone Os, Apple Itunes, Apple Safari, Apple Tvos, Apple Watchos, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2019-8506?

Upgrade to a fixed version. US federal agencies must fix it by 25 May 2022.

## Is CVE-2019-8506 being exploited?

Yes. Attackers have exploited CVE-2019-8506 in the wild since at least 4 May 2022.

Public exploit code:

- WebKit JavaScriptCore - 'createRegExpMatchesArray' Type Confusion (exploitdb)

## Other vulnerabilities in Apple Icloud

- [CVE-2020-27932](https://insights.sbomify.com/CVE-2020-27932/): Apple Multiple Products Type Confusion (high 7.8, exploited in the wild)
- [CVE-2019-8746](https://insights.sbomify.com/CVE-2019-8746/): Memory corruption in iOS (critical 9.8)
- [CVE-2019-8749](https://insights.sbomify.com/CVE-2019-8749/): Memory corruption in iOS (critical 9.8)
- [CVE-2019-8756](https://insights.sbomify.com/CVE-2019-8756/): Memory corruption in iOS (critical 9.8)
- [CVE-2020-9895](https://insights.sbomify.com/CVE-2020-9895/): Use after free in Safari (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-8506 and fix it if it is affected.

What it is: CVE-2019-8506 is a high-severity memory corruption vulnerability in Apple Icloud, published on 18 Dec 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: Yes. Attackers have exploited CVE-2019-8506 in the wild since at least 4 May 2022.

Affected product: Apple Icloud. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2019-8506/ (Markdown: https://insights.sbomify.com/CVE-2019-8506/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-8506
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-8506
- OSV: https://osv.dev/vulnerability/CVE-2019-8506

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-8506/
Summaries are generated and may contain mistakes; the official description above is the record.