Vulnerability · Published Mar 27, 2026 · Assigned by VulDB

CVE-2026-4990chatwoot Signup Endpoint login improper authorization

High 7.3

In plain English

A high-severity security flaw in chatwoot. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.4%top 70.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	chatwoot	4.11.04.11.1

Weakness: CWE-285, CWE-266 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-353877 | chatwoot Signup Endpoint login improper authorization vdb-entry, technical-description
VDB-353877 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #772515 | chatwoot 4.11.1 Business Logic Errors third-party-advisory