# CVE-2026-119446: Session fixation in the CLI login flow allows an unauthenticated attacker to obtain a user's API token


- **Severity:** Critical 9.4 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 10 Nov 2026
- **Updated:** 12 Nov 2026
- **Also known as:** EEF-CVE-2026-119446, GHSA-9vr9-463q-46qp

## 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 (Session Fixation)

## 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.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-119446 and fix it if it is affected.

What it is: CVE-2026-119446 is a critical vulnerability in nerves-hub nerves_hub_web, published on 10 Nov 2026. 
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-119446 exists.

Affected product: nerves-hub nerves_hub_web. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-119446/ (Markdown: https://insights.sbomify.com/CVE-2026-119446/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-119446
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-119446
- OSV: https://osv.dev/vulnerability/CVE-2026-119446

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-119446/
Summaries are generated and may contain mistakes; the official description above is the record.