# CVE-2026-72843: EverShop Missing Authorization on PATCH /api/customers/:id Allows Unauthenticated Account Takeover

> Unauthenticated attackers can take over customer accounts by modifying email and password fields via an unprotected API endpoint.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2026
- **Updated:** 1 Oct 2026
- **Also known as:** GHSA-m3qj-pp48-6w2p

## What is CVE-2026-72843?

CVE-2026-72843 is a critical missing authorization vulnerability in evershopcommerce evershop, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The customer update route in EverShop is declared with "access": "public" in packages/evershop/src/modules/customer/api/updateCustomer/route.json, which causes the admin authentication middleware to call next() without checking the caller, and no customer-session middleware guards the route; the only middleware in the chain parses the JSON body. The handler in updateCustomer.js then loads the customer by the uuid taken from the URL path and writes the supplied fields back to that record, hashing a password if one is provided, without verifying that the caller owns the record. An unauthenticated request carrying a known customer uuid can therefore overwrite that customer's email address and password and read back the updated record from the 200 response, taking over the account and locking out its owner. Customer uuids are exposed through order confirmation email links and administrative URLs. Version 2.2.1 changes the route to "access": "private".

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-72843?


## How do I fix CVE-2026-72843?

No fix has been published for CVE-2026-72843 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-72843 being exploited?

There is no known exploitation of CVE-2026-72843 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-72843 and fix it if it is affected.

What it is: CVE-2026-72843 is a critical missing authorization vulnerability in evershopcommerce evershop, published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-72843 in the wild and no public exploit code.

Affected product: evershopcommerce evershop. 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-2026-72843/ (Markdown: https://insights.sbomify.com/CVE-2026-72843/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-72843
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-72843
- OSV: https://osv.dev/vulnerability/CVE-2026-72843

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-72843/
Summaries are generated and may contain mistakes; the official description above is the record.