CVE-2026-15542 will-moss Isaiah Websocket Connection Authentication main.go improper authentication
Remote attackers can bypass authentication in the Isaiah web application's websocket connection, potentially gaining unauthorized access.
- 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-2026-15542?
CVE-2026-15542 is a medium-severity authentication bypass vulnerability in will-moss Isaiah, published on 13 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been found in will-moss Isaiah up to 1.36.9. This affects an unknown function of the file app/main.go of the component Websocket Connection Authentication. The manipulation leads to improper authentication. The attack can be initiated remotely. The pull request to fix this issue awaits acceptance.
Weakness: CWE-287
Which versions are affected by CVE-2026-15542?
How do I fix CVE-2026-15542?
No fix has been published for CVE-2026-15542 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-15542 being exploited?
There is no known exploitation of CVE-2026-15542 in the wild and no public exploit code.
Sources
Also known as GHSA-9cxj-6mj4-pxvp.