CVE-2026-51153 Cross-site scripting in n/a
A low-privileged attacker can inject malicious scripts via crafted task templates, leading to code execution in victim browsers.
- 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-2026-51153?
CVE-2026-51153 is a medium-severity cross-site scripting vulnerability in n/a, published on 31 Aug 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
Stored Cross-Site Scripting (XSS) in TaskRunHandler.post() in web/handlers/task.py in QD 20220208 through 20250803. When a task is run via /task/<taskid>/run, the handler renders task log content (logtmp) into the HTML response using Python % string formatting without HTML encoding. logtmp is populated from the exception object or from new_env.variables.__log__, which is attacker-controlled via the template extract_variables mechanism. A low-privileged authenticated attacker can create a crafted HAR template that extracts arbitrary HTML/JavaScript into the __log__ variable via the api://util/unicode endpoint. When a victim triggers the task run, the embedded script executes in the victim browser within the QD application context.
Weakness: CWE-79
Which versions are affected by CVE-2026-51153?
How do I fix CVE-2026-51153?
No fix has been published for CVE-2026-51153 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-2026-51153 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-51153 exists.
Sources
Also known as GHSA-wfcf-9h78-ggcj.