# CVE-2026-87854: Subscriptions for WooCommerce < 2.0.3 - Unauthenticated Subscription Data Disclosure via REST API Secret Key Bypass

> Unauthenticated attackers can bypass REST API secret validation to retrieve sensitive subscription data, including customer usernames and payment details.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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:** 16 Sep 2026
- **Updated:** 17 Sep 2026
- **Also known as:** GHSA-mp62-wj23-fc7f

## What is CVE-2026-87854?

CVE-2026-87854 is a medium-severity vulnerability in Unknown Subscriptions for WooCommerce, published on 16 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Subscriptions for WooCommerce WordPress plugin before 2.0.3 does not correctly validate the shared secret protecting one of its REST endpoints, allowing unauthenticated users to retrieve the store's full list of subscriptions, including customer usernames, product names, recurring amounts and payment dates.

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2026-87854?


## How do I fix CVE-2026-87854?

No fix has been published for CVE-2026-87854 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-87854 being exploited?

There is no known exploitation of CVE-2026-87854 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-87854 and fix it if it is affected.

What it is: CVE-2026-87854 is a medium-severity vulnerability in Unknown Subscriptions for WooCommerce, published on 16 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-2026-87854 in the wild and no public exploit code.

Affected product: Unknown Subscriptions for WooCommerce. 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-2026-87854/ (Markdown: https://insights.sbomify.com/CVE-2026-87854/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-87854
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-87854
- OSV: https://osv.dev/vulnerability/CVE-2026-87854

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-87854/
Summaries are generated and may contain mistakes; the official description above is the record.