CVE-2026-48208 Denial-of-Service via SVG Rendering in Ticket
Attackers can cause browser resource exhaustion and denial of service by injecting malicious SVG content into ticket emails, affecting OTRS agents and customers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-48208?
CVE-2026-48208 is a medium-severity denial of service vulnerability in Otrs Otrs, published on 1 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An improper neutralization of active SVG content in OTRS or ((OTRS)) Community Edition ticket article rendering allows attackers to inject specially crafted SVG payloads via email content, leading to browser-side resource exhaustion and denial of service when affected tickets are opened by an agent or customer. The issue can be exploited without JavaScript execution and is not mitigated by the configured Content Security Policy (CSP).
This issue affects OTRS:
* 7.0.X * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.4.X
Please note that ((OTRS)) Community Edition 6.x and before are vulnerable. Products based on the ((OTRS)) Community Edition also very likely to be affected
Which versions are affected by CVE-2026-48208?
It affects 1 product.
Products include Otrs Otrs.
How do I fix CVE-2026-48208?
No fix has been published for CVE-2026-48208 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-48208 being exploited?
There is no known exploitation of CVE-2026-48208 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Otrs Otrs
Sources
Also known as GHSA-8xg9-c63w-vfj6.