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.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
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
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.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-104246 being exploited?
There is no known exploitation of CVE-2026-104246 in the wild and no public exploit code.
Sources
Also known as GHSA-9vjv-8c2x-cq8c.