Heap buffer overflow via 32-bit string-length truncation in MongoDB PHP Driver
The BSON encoder in the MongoDB PHP Driver converts a string length to a 32-bit value without validation. When an affected application encodes a string near 4 GiB, the allocation size can wrap while the copy operation uses the original length. The resulting heap buffer overflow can corrupt process memory or terminate the PHP process. Reaching this issue requires a non-default runtime configuration that permits multi-gigabyte values. No MongoDB server interaction is required.
CVE-2026-106432
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-2026-106432
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": "1.16.0",
"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-2026-106432
Source reference:
/cveMetadata/cveId
Publisher severity
low
Source reference: /containers/cna/metrics
- Event
- #15701 · Revision 1
- Added to Heist Feed
- Publisher date