# CVE-2024-40866: Other in Safari

> Visiting a malicious website may lead to address bar spoofing in Safari, allowing attackers to mislead users about the current site.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 16 Sep 2024
- **Updated:** 2 Apr 2026
- **Also known as:** DEBIAN-CVE-2024-40866, GHSA-h9cp-5vvc-8wqc, UBUNTU-CVE-2024-40866

## What is CVE-2024-40866?

CVE-2024-40866 is a medium-severity vulnerability in Apple Macos, published on 16 Sep 2024. 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

The issue was addressed with improved UI. This issue is fixed in Safari 18, macOS Sequoia 15. Visiting a malicious website may lead to address bar spoofing.

## Which versions are affected by CVE-2024-40866?

It affects 2 products.


Products: Apple Macos, Apple Safari.

## How do I fix CVE-2024-40866?

Upgrade to a fixed version.

## Is CVE-2024-40866 being exploited?

There is no known exploitation of CVE-2024-40866 in the wild and no public exploit code.

## Other vulnerabilities in Apple Macos

- [CVE-2026-65400](https://insights.sbomify.com/CVE-2026-65400/): Apple macOS Improper Authentication (critical 9.8, exploited in the wild)
- [CVE-2024-44146](https://insights.sbomify.com/CVE-2024-44146/): Security feature bypass in macOS (critical 10.0)
- [CVE-2024-44148](https://insights.sbomify.com/CVE-2024-44148/): Security feature bypass in macOS (critical 10.0)
- [CVE-2023-38586](https://insights.sbomify.com/CVE-2023-38586/): Security feature bypass in macOS (critical 10.0)
- [CVE-2023-40455](https://insights.sbomify.com/CVE-2023-40455/): Security feature bypass in macOS (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-40866 and fix it if it is affected.

What it is: CVE-2024-40866 is a medium-severity vulnerability in Apple Macos, published on 16 Sep 2024. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-40866 in the wild and no public exploit code.

Affected product: Apple Macos. 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-2024-40866/ (Markdown: https://insights.sbomify.com/CVE-2024-40866/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-40866
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-40866
- OSV: https://osv.dev/vulnerability/CVE-2024-40866

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-40866/
Summaries are generated and may contain mistakes; the official description above is the record.