# CVE-2026-100143: FluentCart < 1.6.5 - Unauthenticated Guest Customer Account Takeover via Checkout Email

> Unauthenticated attackers can take over guest customer accounts by supplying known email addresses during checkout without verification.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Sep 2026
- **Updated:** 30 Sep 2026
- **Also known as:** GHSA-r98p-r63w-xp79

## What is CVE-2026-100143?

CVE-2026-100143 is a medium-severity authentication bypass vulnerability in Unknown FluentCart A New Era of eCommerce, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The FluentCart A New Era of eCommerce  WordPress plugin before 1.6.5 does not verify that the person placing a guest checkout controls the email address supplied, allowing unauthenticated attackers who know an existing guest customer's email to obtain a logged-in account bearing that address together with the customer's stored record.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2026-100143?


## How do I fix CVE-2026-100143?

No fix has been published for CVE-2026-100143 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-100143 being exploited?

There is no known exploitation of CVE-2026-100143 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-100143 and fix it if it is affected.

What it is: CVE-2026-100143 is a medium-severity authentication bypass vulnerability in Unknown FluentCart A New Era of eCommerce, published on 30 Sep 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-2026-100143 in the wild and no public exploit code.

Affected product: Unknown FluentCart A New Era of eCommerce. 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-2026-100143/ (Markdown: https://insights.sbomify.com/CVE-2026-100143/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-100143
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-100143
- OSV: https://osv.dev/vulnerability/CVE-2026-100143

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-100143/
Summaries are generated and may contain mistakes; the official description above is the record.