# CVE-2026-42891: Microsoft Edge (Chromium-based) for Android Spoofing Vulnerability

> An attacker can spoof critical UI information in Microsoft Edge for Android, potentially misleading users about the current page context.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 May 2026
- **Updated:** 10 Aug 2026
- **Also known as:** GHSA-hg2q-w8gq-jmf7

## What is CVE-2026-42891?

CVE-2026-42891 is a medium-severity vulnerability in Microsoft Edge Chromium, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

User interface (ui) misrepresentation of critical information in Microsoft Edge (Chromium-based) allows an unauthorized attacker to perform spoofing over a network.

Weakness: CWE-451 (User Interface (UI) Misrepresentation of Critical Information)

## Which versions are affected by CVE-2026-42891?

It affects 1 product.


Products: Microsoft Edge Chromium.

## How do I fix CVE-2026-42891?

No fix has been published for CVE-2026-42891 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-42891 being exploited?

There is no known exploitation of CVE-2026-42891 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Edge Chromium

- [CVE-2024-21326](https://insights.sbomify.com/CVE-2024-21326/): Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability (critical 9.6)
- [CVE-2023-35618](https://insights.sbomify.com/CVE-2023-35618/): Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability (critical 9.6)
- [CVE-2023-36735](https://insights.sbomify.com/CVE-2023-36735/): Microsoft Edge (Chromium-based) Elevation of Privilege Vulnerability (critical 9.6)
- [CVE-2022-33649](https://insights.sbomify.com/CVE-2022-33649/): Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability (critical 9.6)
- [CVE-2026-58289](https://insights.sbomify.com/CVE-2026-58289/): Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-42891 and fix it if it is affected.

What it is: CVE-2026-42891 is a medium-severity vulnerability in Microsoft Edge Chromium, published on 12 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-42891 in the wild and no public exploit code.

Affected product: Microsoft Edge Chromium. 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-2026-42891/ (Markdown: https://insights.sbomify.com/CVE-2026-42891/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-42891
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-42891
- OSV: https://osv.dev/vulnerability/CVE-2026-42891

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-42891/
Summaries are generated and may contain mistakes; the official description above is the record.