Answer in brief
CVE-2026-106436 records a Medium severity (CVSS 6.3) vulnerability in Application denial of service and data truncation via unchecked BSON append failures in MongoDB PHP Driver. The current sources do not mark it as known exploited. The current feed maps MongoDB/PHP 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 6.3. 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/PHP Driver (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| MongoDB/PHP Drivergeneric | >=1.3.0 <1.21.11 || >=2.0.0 <2.1.11 || >=2.2.0 <2.5.4 | 1.21.11, 2.1.11, 2.5.4 |
Published upstream
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 8, 2026
The BSON encoder in the MongoDB PHP Driver does not check some return values after a document exceeds libbson's size limit. This can leave the encoder in an invalid state. An unauthenticated actor who can cause an affected application to encode an unusually large data structure can terminate the PHP worker or cause the resulting document to omit fields. No MongoDB server connection or database authentication is required.
Quoted source text, attributed separately from HOL analysis.