Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-120999— Improper authentication lets Google sign-in and confirmation links sign users in to accounts registered with their email address by someone else

Quick assessment

Affected
nerves-hub nerves_hub_web
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 nerves_hub 项目中的 nerves_hub_web 模块存在身份验证不当漏洞，影响 Google 登录和邮箱确认功能。该漏洞允许攻击者注册他人的邮箱地址，并在该用户通过 Google 登录时，将其会话劫持至攻击者控制的账户。 具体而言， 函数在将 Google 用户登录时，会将其关联到任何尚未绑定 Google 账户但邮箱地址相同的现有账户，自动完成绑定并将该邮箱标记为“已确认”，而无需账户所有者证明其拥有该邮箱地址。同样， 函数也会让任何点击确认链接的用户成功登录。 攻击者可利用注册表单注册目标邮箱

CVSS 7.4 · High
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-120999

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Improper authentication lets Google sign-in and confirmation links sign users in to accounts registered with their email address by someone else
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Authentication vulnerability in Google sign-in and email confirmation in nerves-hub nerves_hub_web allows an attacker who registers another person's email address to share that person's account once they sign in. NervesHub.Accounts.update_or_create_user_from_ueberauth/1 signs a Google user in to any account carrying the same email that is not yet linked to a Google account, links it and marks the email confirmed, without the account's owner ever having proved they own the address. NervesHubWeb.SessionController.confirm/2 likewise signs in whoever follows a confirmation link. An attacker registers the address from the sign-up form, changes their own account's email to it, or registers it as an organization admin from an invite link, and keeps the password; when the address's owner signs in with Google or follows the confirmation link, they land in that account. The Google path also creates accounts with registrations closed and never checks Google's email_verified claim, and the API's password sign-in in NervesHubWeb.API.UserController issues tokens to accounts whose email was never confirmed. The attacker gains only what the victim is granted afterwards, and nothing on accounts whose owners never use either path. This issue affects nerves_hub: from 2.3.0 before 2.5.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
nerves-hub nerves_hub_web 2.3.0 ~ 2.5.3 cpe:2.3:a:nerves-hub:nerves_hub_web:*:*:*:*:*:*:*:*
nerves-hub nerves_hub_web 2.3.0 ~ 2.5.3 cpe:2.3:a:nerves-hub:nerves_hub_web:*:*:*:*:*:*:*:*
nerves-hub nerves_hub_web 74982672ab914bd6f37c3bc0e24a06e3474fa030 ~ 54dbf93c3bd323df08223a853c9afcf0b4dbf8e4 cpe:2.3:a:nerves-hub:nerves_hub_web:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-120999

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-120999

请登录查看更多情报信息。

Other References for CVE-2026-120999 (5)

Same Patch Batch · nerves-hub · 2026-11-10 · 6 CVEs total

CVE-2026-119446 9.4 CRITICAL Session fixation in the CLI login flow allows an unauthenticated attacker to obtain a user
CVE-2026-120730 8.6 HIGH Mass assignment of organization, product and deployment group IDs allows users to write in
CVE-2026-120295 7.1 HIGH Incorrect authorization in the devices page bulk move allows view-role members to move dev
CVE-2026-120286 5.3 MEDIUM Missing authorization in device and deployment group page events allows view-role members
CVE-2026-120997 2.3 LOW Improper session invalidation keeps removed or demoted members' open pages and device cons

IV. Related Vulnerabilities

Same product: nerves_hub_web
Same vendor: nerves-hub
Same weakness: CWE-287