CVE-2026-47173 Quest Bot: Ticket reason allows mass-mention injection
Attackers can inject mentions into ticket reasons, causing the bot to spam notifications to staff or everyone in the channel.
- 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-2026-47173?
CVE-2026-47173 is a medium-severity cross-site scripting vulnerability in duck-organization quest-bot, published on 11 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Quest Bot is an opensource modern Discord Bot built for moderation, utilities and support. Prior to version 1.0.3, a normal user can create a ticket with a reason containing @everyone, @here, user mentions, or role mentions. When the ticket is created, the bot posts the attacker-controlled reason into the new ticket channel without suppressing mentions. If the bot has permission to use those mentions, the attacker can make the bot ping staff or everyone with access to the ticket channel. This issue has been patched in version 1.0.3.
Weakness: CWE-116
Which versions are affected by CVE-2026-47173?
How do I fix CVE-2026-47173?
No fix has been published for CVE-2026-47173 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-2026-47173 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47173 exists.
Sources
Also known as GHSA-27xg-395c-xfcx.