Answer in brief
CVE-2026-126817 records a Medium severity (CVSS 6.0) vulnerability in Mongoid stores encrypted fields in plaintext when two models share a collection. The current sources do not mark it as known exploited. The current feed maps MongoDB/Ruby Driver (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps MongoDB/Ruby Driver (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| MongoDB/Ruby Drivergeneric | 9.0.0 || 9.0.1 || 9.0.2 || 9.0.3 || 9.0.4 || 9.0.5 || 9.0.6 || 9.0.7 || 9.0.8 || 9.0.9 || 9.0.10 || 9.0.11 || 9.0.12 || 9.1.0 || 9.1.1 | Not reported |
Published upstream
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 13, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 13, 2026
A flaw in the automatic client-side encryption schema generation of the Mongoid ODM may cause values that an application declared for encryption to be written and stored as cleartext when more than one model is mapped onto the same storage location. No error or warning is raised. A party holding an ordinary read-only database account, with no access to the encryption key material, may then obtain those values in clear form.
Quoted source text, attributed separately from HOL analysis.