Quick answers
- Is CVE-2026-120955 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-120955 being exploited in the wild.
- How severe is CVE-2026-120955?
- High severity, with a CVSS score of 7.5, published 3 November 2026.
- Which products and versions are affected?
- MongoDB C Driver.
- Is there a fix for CVE-2026-120955?
- 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-2026-120955 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-120955?
- Check whether you run MongoDB C Driver. 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
The GridFS file download API fails to check the result of an internal stream operation under specific error conditions, leading to unchecked error propagation that terminates the process. This affects applications using the C Driver's GridFS API when an attacker-controlled file download is initiated under adverse conditions. The vulnerability results in denial of service through process termination.
Affected products
- MongoDB C Driver
Timeline
- 2026-11-03: disclosed