# CVE-2026-19213: WonderTrader Pending Order TraderAdapter.h _undone_qty behavioral workflow

> Attackers can manipulate pending order quantities in WonderTrader, bypassing intended trading workflow enforcement.

- **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/E:P`)
- **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:** 7 Aug 2026
- **Updated:** 7 Aug 2026
- **Also known as:** GHSA-22gg-289x-58qq

## What is CVE-2026-19213?

CVE-2026-19213 is a medium-severity vulnerability in WonderTrader, published on 7 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was identified in WonderTrader up to 0.9.9. Affected is the function _undone_qty in the library src/WtCore/TraderAdapter.h of the component Pending Order Handler. The manipulation of the argument getUndoneQty leads to enforcement of behavioral workflow. The attack is possible to be carried out remotely. The exploit is publicly available and might be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-841 (Improper Enforcement of Behavioral Workflow), CWE-840

## Which versions are affected by CVE-2026-19213?


## How do I fix CVE-2026-19213?

No fix has been published for CVE-2026-19213 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-19213 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19213 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-19213 and fix it if it is affected.

What it is: CVE-2026-19213 is a medium-severity vulnerability in WonderTrader, published on 7 Aug 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-2026-19213 exists.

Affected product: WonderTrader. 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-2026-19213/ (Markdown: https://insights.sbomify.com/CVE-2026-19213/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-19213
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-19213
- OSV: https://osv.dev/vulnerability/CVE-2026-19213

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-19213/
Summaries are generated and may contain mistakes; the official description above is the record.