# CVE-2026-104246: Contact Form 7 Signature Addon <= 4.2.2 - Unauthenticated Arbitrary File Read via Path Traversal in Email Attachments

> Unauthenticated attackers can read arbitrary files via path traversal in email attachments if forms email copies to attacker-controlled addresses.

- **Severity:** Medium 5.9 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Oct 2026
- **Updated:** 18 Oct 2026
- **Also known as:** GHSA-9vjv-8c2x-cq8c

## What is CVE-2026-104246?

CVE-2026-104246 is a medium-severity path traversal vulnerability in Unknown Contact Form 7 Signature Addon, published on 17 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Contact Form 7 Signature Addon WordPress plugin through 4.2.2 does not sanitize a signature field value before building an email attachment path from it, allowing unauthenticated users to attach arbitrary files (bounded to wp-content on current Contact Form 7) to a form's outgoing email via path traversal; when a form is configured to email a copy to a submitter-controlled address, the attacker can read the targeted file.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-104246?


## How do I fix CVE-2026-104246?

No fix has been published for CVE-2026-104246 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-104246 being exploited?

There is no known exploitation of CVE-2026-104246 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-104246 and fix it if it is affected.

What it is: CVE-2026-104246 is a medium-severity path traversal vulnerability in Unknown Contact Form 7 Signature Addon, published on 17 Oct 2026. 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-2026-104246 in the wild and no public exploit code.

Affected product: Unknown Contact Form 7 Signature Addon. 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-2026-104246/ (Markdown: https://insights.sbomify.com/CVE-2026-104246/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-104246
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-104246
- OSV: https://osv.dev/vulnerability/CVE-2026-104246

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-104246/
Summaries are generated and may contain mistakes; the official description above is the record.