CVE-2026-106155 Stored Cross-site Scripting (XSS) in Telerik Report Server Web Report Viewers
Authenticated attackers can inject scripts into reports, enabling code execution and privilege escalation in other users' sessions.
- 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-2026-106155?
CVE-2026-106155 is a high-severity cross-site scripting vulnerability in Progress Software Telerik Report Server, published on 9 Oct 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
In Progress® Telerik® Report Server prior to version 12.2.26.1007, a stored cross-site scripting vulnerability in the shared reporting engine allows an authenticated report author to embed javascript: or vbscript: URLs in report navigation actions or HTML text box links. When another user views the malicious report and the embedded navigation is triggered, attacker-controlled script can execute in the web report viewer's origin. In a multi-user Report Server deployment, this can enable privilege escalation by performing actions in a higher-privilege user's authenticated session, including an administrator's session.
Weakness: CWE-79
Which versions are affected by CVE-2026-106155?
How do I fix CVE-2026-106155?
No fix has been published for CVE-2026-106155 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-106155 being exploited?
There is no known exploitation of CVE-2026-106155 in the wild and no public exploit code.
Sources
Also known as GHSA-97qc-r4xh-88c5.