CVE-2026-82043 UTMStack < 11.2.16 Account Enumeration via Password Reset Endpoint
Unauthenticated attackers can enumerate registered email addresses via differing HTTP responses in the password reset endpoint, facilitating targeted phishing.
- 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-2026-82043?
CVE-2026-82043 is a medium-severity vulnerability in UTMStack, published on 2 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
UTMStack before 11.2.16 contains an account enumeration vulnerability that allows unauthenticated attackers to determine registered email addresses by observing differing HTTP responses from the POST /api/account/reset-password/init endpoint. Attackers can submit arbitrary email addresses and distinguish registered accounts, which return 200 OK, from unregistered accounts, which trigger a 500 Internal Server Error with backend error details, enabling targeted phishing or credential attacks.
Weakness: CWE-204
Which versions are affected by CVE-2026-82043?
How do I fix CVE-2026-82043?
No fix has been published for CVE-2026-82043 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-82043 being exploited?
There is no known exploitation of CVE-2026-82043 in the wild and no public exploit code.
Sources
Also known as GHSA-62x9-x97p-5mj3.