# CVE-2026-108690: mall4j through 4.0 Operator Precedence Error Exposes Other Users' Cart Items via /p/shopCart/expiryProdList

> Authenticated users can view other shoppers' cart items due to an SQL filter logic error in the mall4j e-commerce platform.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/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:** 11 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-m4x2-mf8c-9rmw

## What is CVE-2026-108690?

CVE-2026-108690 is a medium-severity vulnerability in gz-yami mall4j, published on 11 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

mall4j through 4.0 contains an information disclosure vulnerability that allows authenticated customers to read other shoppers' cart items due to an operator precedence error in the getShopCartExpiryItems SQL filter. Attackers with any storefront account can request GET /p/shopCart/expiryProdList to retrieve off-shelf product basket entries including product, SKU, quantity, shop, and promoter card numbers.

Weakness: CWE-783 (Operator Precedence Logic Error)

## Which versions are affected by CVE-2026-108690?


## How do I fix CVE-2026-108690?

No fix has been published for CVE-2026-108690 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108690 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108690 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108690 and fix it if it is affected.

What it is: CVE-2026-108690 is a medium-severity vulnerability in gz-yami mall4j, published on 11 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-2026-108690 exists.

Affected product: gz-yami mall4j. 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-2026-108690/ (Markdown: https://insights.sbomify.com/CVE-2026-108690/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108690
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108690
- OSV: https://osv.dev/vulnerability/CVE-2026-108690

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108690/
Summaries are generated and may contain mistakes; the official description above is the record.