CVE-2026-119446 Session fixation in the CLI login flow allows an unauthenticated attacker to obtain a user's API token
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-119446?
CVE-2026-119446 is a critical vulnerability in nerves-hub nerves_hub_web, published on 10 Nov 2026.
Official description
Session Fixation vulnerability in the CLI login flow in nerves-hub nerves_hub_web allows an unauthenticated attacker to obtain an API token for another user's account via a crafted login link. Starting a CLI login with POST /api/auth/cli_session needs no authentication and returns a polling token, a confirmation URL that carries that token, and a confirmation code. When a signed-in user opens that URL and clicks Confirm, NervesHub.Accounts.verify_cli_session_token/2 creates an API token for the user's account and stores it on the login, and the next poll of GET /api/auth/cli_session/<token> returns it to whoever started the login.
The confirmation code is only displayed and is never compared with anything, so it cannot show that the person confirming is the one who started the login. The confirm form carries a CSRF token and the page cannot be framed, so the attacker has to persuade the user to open the link and click the button themselves.
This issue affects nerves_hub: from 2.5.0 before 2.5.3.
Weakness: CWE-384
Which versions are affected by CVE-2026-119446?
How do I fix CVE-2026-119446?
No fix has been published for CVE-2026-119446 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-119446 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-119446 exists.
Sources
Also known as EEF-CVE-2026-119446, GHSA-9vr9-463q-46qp.