# CVE-2006-2786: Other in n/a

> Remote attackers can exploit HTTP response smuggling in Firefox via specific proxy configurations to bypass security boundaries and access data from different sites.

- **Severity:** Low 2.6 (`AV:N/AC:H/Au:N/C:N/I:P/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:** 2 Jun 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2006-2786, GHSA-h93j-jrrw-xqfp

## What is CVE-2006-2786?

CVE-2006-2786 is a low-severity vulnerability in Mozilla Firefox, published on 2 Jun 2006. 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

HTTP response smuggling vulnerability in Mozilla Firefox and Thunderbird before 1.5.0.4, when used with certain proxy servers, allows remote attackers to cause Firefox to interpret certain responses as if they were responses from two different sites via (1) invalid HTTP response headers with spaces between the header name and the colon, which might not be ignored in some cases, or (2) HTTP 1.1 headers through an HTTP 1.0 proxy, which are ignored by the proxy but processed by the client.

## Which versions are affected by CVE-2006-2786?

It affects 2 products.


Products: Mozilla Firefox, Mozilla Thunderbird.

## How do I fix CVE-2006-2786?

Upgrade to a fixed version.

## Is CVE-2006-2786 being exploited?

There is no known exploitation of CVE-2006-2786 in the wild and no public exploit code.

## Other vulnerabilities in Mozilla Firefox

- [CVE-2019-11708](https://insights.sbomify.com/CVE-2019-11708/): Mozilla Firefox and Thunderbird Sandbox Escape (critical 10.0, exploited in the wild)
- [CVE-2010-3765](https://insights.sbomify.com/CVE-2010-3765/): Mozilla Multiple Products Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2022-26486](https://insights.sbomify.com/CVE-2022-26486/): Mozilla Firefox Use-After-Free (critical 9.6, exploited in the wild)
- [CVE-2022-26485](https://insights.sbomify.com/CVE-2022-26485/): Mozilla Firefox Use-After-Free (high 8.8, exploited in the wild)
- [CVE-2019-11707](https://insights.sbomify.com/CVE-2019-11707/): Mozilla Firefox and Thunderbird Type Confusion (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-2786 and fix it if it is affected.

What it is: CVE-2006-2786 is a low-severity vulnerability in Mozilla Firefox, published on 2 Jun 2006. 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-2006-2786 in the wild and no public exploit code.

Affected product: Mozilla Firefox. 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-2006-2786/ (Markdown: https://insights.sbomify.com/CVE-2006-2786/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-2786
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-2786
- OSV: https://osv.dev/vulnerability/CVE-2006-2786

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-2786/
Summaries are generated and may contain mistakes; the official description above is the record.