# CVE-2026-67184: TinyWeb 0.0.8 Null Pointer Dereference DoS via Malformed HTTP Request

> Unauthenticated attackers can crash TinyWeb server workers by sending malformed HTTP requests, causing a permanent denial of service until manual restart.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Jul 2026
- **Updated:** 28 Jul 2026
- **Also known as:** GHSA-r4g2-gw8j-xgxv

## What is CVE-2026-67184?

CVE-2026-67184 is a high-severity vulnerability in GeneralSandman TinyWeb, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

TinyWeb through 0.0.8 contains a null pointer dereference vulnerability that allows unauthenticated remote attackers to crash worker processes by sending a malformed HTTP request line with an invalid version string. The HttpParser::execute() function fails to allocate the Url object when version parsing fails, leaving the url pointer NULL, and buildResponse() subsequently dereferences this NULL pointer without checking the valid_requ flag, producing a SIGSEGV that terminates the worker process and, when repeated across all workers, takes the server permanently offline until manually restarted.

Weakness: CWE-476 (NULL Pointer Dereference)

## Which versions are affected by CVE-2026-67184?


## How do I fix CVE-2026-67184?

No fix has been published for CVE-2026-67184 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-67184 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67184 exists.

Public exploit code:

- Security Advisory: Unauthenticated NULL Pointer Dereference Crashes the Server (TinyWeb) (github_poc): https://github.com/theopaid/CVE-2026-67184-Unauthenticated-NULL-Pointer-Dereference-Crashes-the-Server-TinyWeb-

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-67184 and fix it if it is affected.

What it is: CVE-2026-67184 is a high-severity vulnerability in GeneralSandman TinyWeb, published on 28 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-67184 exists.

Affected product: GeneralSandman TinyWeb. 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-2026-67184/ (Markdown: https://insights.sbomify.com/CVE-2026-67184/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-67184
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-67184
- OSV: https://osv.dev/vulnerability/CVE-2026-67184

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-67184/
Summaries are generated and may contain mistakes; the official description above is the record.