CVE-2026-1356 Server-side request forgery in Converter for Media – Optimize images | Convert WebP & AVIF
Unauthenticated attackers can exploit SSRF in the Converter for Media plugin to query and modify internal services via arbitrary web requests.
- 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-2026-1356?
CVE-2026-1356 is a medium-severity server-side request forgery vulnerability in mateuszgbiorczyk Converter for Media – Optimize images | Convert WebP & AVIF, published on 12 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Converter for Media – Optimize images | Convert WebP & AVIF plugin for WordPress is vulnerable to Server-Side Request Forgery in all versions up to, and including, 6.5.1 via the PassthruLoader::load_image_source function. This makes it possible for unauthenticated attackers to make web requests to arbitrary locations originating from the web application and can be used to query and modify information from internal services.
Weakness: CWE-918
Which versions are affected by CVE-2026-1356?
How do I fix CVE-2026-1356?
No fix has been published for CVE-2026-1356 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-1356 being exploited?
There is no known exploitation of CVE-2026-1356 in the wild and no public exploit code.
Sources
Also known as GHSA-cj74-j73p-qf3x.