# CVE-2022-36032: ReactPHP's HTTP server parses encoded cookie names so malicious `__Host-` and `__Secure-` cookies can be sent

> Attackers can bypass cookie security prefixes by exploiting URL decoding flaws in ReactPHP's HTTP server, allowing them to forge secure cookies.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 6 Sep 2022
- **Updated:** 23 Apr 2025
- **Also known as:** GHSA-w3w9-vrf5-8mx8, UBUNTU-CVE-2022-36032

## What is CVE-2022-36032?

CVE-2022-36032 is a medium-severity vulnerability in reactphp http, published on 6 Sep 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ReactPHP HTTP is a streaming HTTP client and server implementation for ReactPHP. In ReactPHP's HTTP server component versions starting with 0.7.0 and prior to 1.7.0, when ReactPHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like `__Host-` and `__Secure-` confused with cookies that decode to such prefix, thus leading to an attacker being able to forge cookie which is supposed to be secure. This issue is fixed in ReactPHP HTTP version 1.7.0. As a workaround, Infrastructure or DevOps can place a reverse proxy in front of the ReactPHP HTTP server to filter out any unexpected `Cookie` request headers.

Weakness: CWE-565 (Reliance on Cookies without Validation and Integrity Checking), CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2022-36032?

2 open source packages ship an affected version, including react/http. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `react/http` | Packagist | From 0.7.0 | 1.7.0 |
| `react/http` | Packagist | From 0.7.0 | 1.7.0 |

Products: Reactphp Http.

## How do I fix CVE-2022-36032?

Upgrade react/http to 1.7.0 or later.

## Is CVE-2022-36032 being exploited?

There is no known exploitation of CVE-2022-36032 in the wild and no public exploit code.

## Other vulnerabilities in reactphp http

- [CVE-2023-26044](https://insights.sbomify.com/CVE-2023-26044/): ReactPHP's HTTP server continues parsing unused multipart parts after reaching limits (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-36032 and fix it if it is affected.

What it is: CVE-2022-36032 is a medium-severity vulnerability in reactphp http, published on 6 Sep 2022. 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-2022-36032 in the wild and no public exploit code.

Affected packages and fixed versions:
- react/http (Packagist): affected from 0.7.0; fixed in 1.7.0
- react/http (Packagist): affected from 0.7.0; fixed in 1.7.0

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-2022-36032/ (Markdown: https://insights.sbomify.com/CVE-2022-36032/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-36032
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-36032
- OSV: https://osv.dev/vulnerability/CVE-2022-36032

---
From sbomify Insights: https://insights.sbomify.com/CVE-2022-36032/
Summaries are generated and may contain mistakes; the official description above is the record.