Quick answers
- Is CVE-2026-120684 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-120684 being exploited in the wild.
- How severe is CVE-2026-120684?
- Medium severity, with a CVSS score of 6.5, published 3 November 2026.
- Which products and versions are affected?
- MongoDB C Driver <UNKNOWN>.
- Is there a fix for CVE-2026-120684?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-120684 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-120684?
- Check whether you run MongoDB C Driver 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.
Technical details
A memory-initialization flaw in GridFS file handling allows uninitialized process memory to be treated as valid file content and stored on the server. A database user with write access can arrange conditions where an application appends to a malformed file, causing the uninitialized memory to be written to records the attacker can read, resulting in information disclosure of sensitive application data including credentials.
Affected products
- MongoDB C Driver <UNKNOWN>
Timeline
- 2026-11-03: disclosed