CVE-2026-19037 WonderTrader Internal Limit Order Book Cache MatchEngine.cpp update_lob behavioral workflow
Attackers can manipulate the internal limit order book cache to enforce unintended behavioral workflows in the trading engine.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-19037?
CVE-2026-19037 is a medium-severity vulnerability in WonderTrader, published on 6 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A weakness has been identified in WonderTrader up to 0.9.9. This vulnerability affects the function MatchEngine::update_lob of the file src/WtBtCore/MatchEngine.cpp of the component Internal Limit Order Book Cache Handler. This manipulation causes enforcement of behavioral workflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-19037?
How do I fix CVE-2026-19037?
No fix has been published for CVE-2026-19037 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-19037 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-19037 exists.
Sources
Also known as GHSA-394j-mpf4-9p7j.