Application denial of service and data truncation via unchecked BSON append failures in MongoDB PHP Driver
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.
CVE-2026-106436
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-106436
PHP Driver
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "MongoDB",
"product": "PHP Driver",
"versions": [
{
"status": "affected",
"version": "1.3.0",
"lessThan": "1.21.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "2.0.0",
"lessThan": "2.1.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "2.2.0",
"lessThan": "2.5.4",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-106436
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #15702 · Revision 1
- Added to Heist Feed
- Publisher date