# CVE-2026-85030: HKUDS AI-Trader selfRegister API Endpoint routes_agent.py logic error

> Attackers can manipulate initial balance arguments to inflate absolute cash values in the AI-Trader leaderboard, affecting data integrity.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Sep 2026
- **Updated:** 5 Sep 2026
- **Also known as:** GHSA-8g5c-c4hq-fmw7

## What is CVE-2026-85030?

CVE-2026-85030 is a medium-severity vulnerability in HKUDS AI-Trader, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been found in HKUDS AI-Trader up to d03ff6c056b32ced735adf7c19ed8175adb1c8df. The affected element is an unknown function of the file service/server/routes_agent.py of the component selfRegister API Endpoint. Such manipulation of the argument initial_balance leads to business logic errors. The attack may be launched remotely. This attack is characterized by high complexity. The exploitability is described as difficult. The exploit has been disclosed to the public and may be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. profit_percent_for_display() divides by INITIAL_CAPITAL + deposited, and challenge scoring's return_pct also normalises against the attacker-inflated starting_cash. So an inflated initial_balance does not yield artificial percent returns - it inflates the absolute cash/equity column only, which is a cosmetic/leaderboard-gaming concern in a simulated game.

Weakness: CWE-840

## Which versions are affected by CVE-2026-85030?


## How do I fix CVE-2026-85030?

No fix has been published for CVE-2026-85030 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85030 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85030 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85030 and fix it if it is affected.

What it is: CVE-2026-85030 is a medium-severity vulnerability in HKUDS AI-Trader, published on 3 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-85030 exists.

Affected product: HKUDS AI-Trader. 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-2026-85030/ (Markdown: https://insights.sbomify.com/CVE-2026-85030/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85030
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85030
- OSV: https://osv.dev/vulnerability/CVE-2026-85030

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-85030/
Summaries are generated and may contain mistakes; the official description above is the record.