# CVE-2018-10895: Qutebrowser CSRF Vulnerability

> A CSRF flaw in qutebrowser allows malicious websites to modify settings and execute arbitrary code via bash scripts.

- **Severity:** Critical 9.3 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/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:** 12 Jul 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-10895, GHSA-wgmx-52ph-qqcw, PYSEC-2018-27, UBUNTU-CVE-2018-10895

## What is CVE-2018-10895?

CVE-2018-10895 is a critical vulnerability in qutebrowser cross-site request forgery flaw allows sites to access 'qute, published on 12 Jul 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

qutebrowser before version 1.4.1 is vulnerable to a cross-site request forgery flaw that allows websites to access 'qute://*' URLs. A malicious website could exploit this to load a 'qute://settings/set' URL, which then sets 'editor.command' to a bash script, resulting in arbitrary code execution.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2018-10895?

3 open source packages ship an affected version, including qutebrowser. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `qutebrowser` | PyPI | All versions | 1.4.1 |
| `qutebrowser` | PyPI | All versions | 1.4.1 |
| `qutebrowser` | PyPI | All versions | 1.4.1 |

Products: Qutebrowser Qutebrowser.

## How do I fix CVE-2018-10895?

Upgrade qutebrowser to 1.4.1 or later.

## Is CVE-2018-10895 being exploited?

There is no known exploitation of CVE-2018-10895 in the wild and no public exploit code.

## Other vulnerabilities in qutebrowser cross-site request forgery flaw allows sites to access 'qute

- [CVE-2021-41146](https://insights.sbomify.com/CVE-2021-41146/): Arbitrary command execution on Windows in qutebrowser (high 8.8)
- [CVE-2018-1000559](https://insights.sbomify.com/CVE-2018-1000559/): Qutebrowser XSS Vulnerability (medium 6.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-10895 and fix it if it is affected.

What it is: CVE-2018-10895 is a critical vulnerability in qutebrowser cross-site request forgery flaw allows sites to access 'qute, published on 12 Jul 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-2018-10895 in the wild and no public exploit code.

Affected packages and fixed versions:
- qutebrowser (PyPI): affected all versions; fixed in 1.4.1
- qutebrowser (PyPI): affected all versions; fixed in 1.4.1
- qutebrowser (PyPI): affected all versions; fixed in 1.4.1

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-2018-10895/ (Markdown: https://insights.sbomify.com/CVE-2018-10895/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-10895
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-10895
- OSV: https://osv.dev/vulnerability/CVE-2018-10895

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-10895/
Summaries are generated and may contain mistakes; the official description above is the record.