# CVE-2018-6115: Security feature bypass in Chrome

> Remote attackers can bypass OS malware checks during file downloads in Google Chrome by exploiting improper flag settings in crafted HTML pages.

- **Severity:** Medium 6.5 (`CVSS:3.0/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:** 4 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-88x6-h36j-mqgw, UBUNTU-CVE-2018-6115

## What is CVE-2018-6115?

CVE-2018-6115 is a medium-severity vulnerability in Google Chrome, published on 4 Dec 2018. 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

Inappropriate setting of the SEE_MASK_FLAG_NO_UI flag in file downloads in Google Chrome prior to 66.0.3359.117 allowed a remote attacker to potentially bypass OS malware checks via a crafted HTML page.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2018-6115?

It affects 1 product.


Products: Google Chrome.

## How do I fix CVE-2018-6115?

Upgrade to a fixed version.

## Is CVE-2018-6115 being exploited?

There is no known exploitation of CVE-2018-6115 in the wild and no public exploit code.

## Other vulnerabilities in Google Chrome

- [CVE-2022-4135](https://insights.sbomify.com/CVE-2022-4135/): Google Chromium GPU Heap Buffer Overflow (critical 9.6, exploited in the wild)
- [CVE-2020-16017](https://insights.sbomify.com/CVE-2020-16017/): Google Chrome Use-After-Free (critical 9.6, exploited in the wild)
- [CVE-2020-16010](https://insights.sbomify.com/CVE-2020-16010/): Google Chrome for Android UI Heap Buffer Overflow (critical 9.6, exploited in the wild)
- [CVE-2026-87491](https://insights.sbomify.com/CVE-2026-87491/): Google Chromium V8 Out of Bounds Write (high 8.8, exploited in the wild)
- [CVE-2026-85046](https://insights.sbomify.com/CVE-2026-85046/): Google Chromium V8 Type Confusion (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-6115 and fix it if it is affected.

What it is: CVE-2018-6115 is a medium-severity vulnerability in Google Chrome, published on 4 Dec 2018. 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-2018-6115 in the wild and no public exploit code.

Affected product: Google Chrome. 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-2018-6115/ (Markdown: https://insights.sbomify.com/CVE-2018-6115/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-6115
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-6115
- OSV: https://osv.dev/vulnerability/CVE-2018-6115

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-6115/
Summaries are generated and may contain mistakes; the official description above is the record.