# CVE-2026-109171: yshop-crm through 2.1.3 Missing Authorization via /admin-api/crm/contract/check

> Authenticated users can approve or reject contracts without proper authorization, altering customer deal and purchase data.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Oct 2026
- **Updated:** 26 Oct 2026
- **Also known as:** GHSA-h7m8-pw8h-m438

## What is CVE-2026-109171?

CVE-2026-109171 is a medium-severity missing authorization vulnerability in guchengwuyue yshop-crm, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

yshop-crm through 2.1.3 contains a missing authorization vulnerability that allows any authenticated back-office user to approve or reject contracts by calling POST /admin-api/crm/contract/check. Because CrmContractController lacks @PreAuthorize and approver checks are commented out, attackers can approve contracts to alter customer deal and purchase data or reject them to return products to stock.

Weakness: CWE-862 (Missing Authorization)

## Which versions are affected by CVE-2026-109171?


## How do I fix CVE-2026-109171?

No fix has been published for CVE-2026-109171 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-109171 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109171 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-109171 and fix it if it is affected.

What it is: CVE-2026-109171 is a medium-severity missing authorization vulnerability in guchengwuyue yshop-crm, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109171 exists.

Affected product: guchengwuyue yshop-crm. 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-2026-109171/ (Markdown: https://insights.sbomify.com/CVE-2026-109171/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-109171
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-109171
- OSV: https://osv.dev/vulnerability/CVE-2026-109171

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-109171/
Summaries are generated and may contain mistakes; the official description above is the record.