Quick answers
- Is CVE-2026-120819 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-120819 being exploited in the wild.
- How severe is CVE-2026-120819?
- Medium severity, with a CVSS score of 4.3, published 10 November 2026.
- Which products and versions are affected?
- MongoDB Server prior to 9.0.7.
- Is there a fix for CVE-2026-120819?
- Yes: fixed in 9.0.7. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-120819 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-120819?
- Check whether you run MongoDB Server at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 9.0.7
Technical details
A memory-management flaw in MongoDB Server's server-side JavaScript execution component allows an authenticated read-only user to access freed memory via a specially crafted database command. The vulnerability returns a bounded amount of adjacent process memory in the command result, enabling information disclosure. The flaw affects the BSON generation in the WASM bridge component.
Affected products
- MongoDB Server prior to 9.0.7
Timeline
- 2026-11-10: disclosed
- 2026-09-30: patched