CVE-2026-4990 chatwoot Signup Endpoint login improper authorization
Remote attackers can bypass signup restrictions by manipulating the signupEnabled parameter, potentially gaining unauthorized access to Chatwoot instances.
- 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-2026-4990?
CVE-2026-4990 is a medium-severity missing authorization vulnerability in chatwoot, published on 27 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A security vulnerability has been detected in chatwoot up to 4.11.1. The affected element is an unknown function of the file /app/login of the component Signup Endpoint. Such manipulation of the argument signupEnabled with the input true leads to improper authorization. The attack can be executed remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-4990?
How do I fix CVE-2026-4990?
No fix has been published for CVE-2026-4990 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-4990 being exploited?
There is no known exploitation of CVE-2026-4990 in the wild and no public exploit code.
Sources
Also known as GHSA-4qxw-jjp5-4rvw.