CVE-2026-57535 Server-side request forgery in pretix
Attackers can trigger Server-Side Request Forgery via injected HTML image tags in PDF rendering, leaking server information and accessing internal networks.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-57535?
CVE-2026-57535 is a low-severity server-side request forgery vulnerability in pretix, published on 25 Jun 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Content injected to PDF rendering contexts could, in many places, include HTML content including <img> tags. If the src attribute of these images pointed to an URL, the PDF rendering engine would download the image from that place and display it, thereby leaking information about the rendering server and possibly creating an SSRF vector in the local network.
Weakness: CWE-80
Which versions are affected by CVE-2026-57535?
How do I fix CVE-2026-57535?
No fix has been published for CVE-2026-57535 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-2026-57535 being exploited?
There is no known exploitation of CVE-2026-57535 in the wild and no public exploit code.
Sources
Also known as GHSA-gjw6-qpff-pf5x.