Vulnerability · Published May 14, 2026 · Assigned by mongodb
CVE-2026-6811PHP Stack Exhaustion
Medium 5.9
In plain English
A medium-severity security flaw in PHP Driver from MongoDB Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.9Medium
Exploit odds (30 days)0.4%top 69.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Stack exhaustion vulnerability in the MongoDB PHP driver can cause application crashes when processing deeply nested BSON documents in unusual circumstances when the source of these BSON documents is not MongoDB Server.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | php-mongodb | no fix listed | DEBIAN-CVE-2026-6811 |
| Debian:13 | php-mongodb | 2.0.0-1+deb13u1 | DEBIAN-CVE-2026-6811 |
| Debian:14 | php-mongodb | 2.5.3-1 | DEBIAN-CVE-2026-6811 |
| Ubuntu:22.04:LTS | php-mongodb | no fix listed | UBUNTU-CVE-2026-6811 |
| Ubuntu:24.04:LTS | php-mongodb | no fix listed | UBUNTU-CVE-2026-6811 |
| Ubuntu:25.10 | php-mongodb | no fix listed | UBUNTU-CVE-2026-6811 |
| Ubuntu:26.04:LTS | php-mongodb | no fix listed | UBUNTU-CVE-2026-6811 |
| Ubuntu:26.10 | php-mongodb | no fix listed | UBUNTU-CVE-2026-6811 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| MongoDB Inc. | PHP Driver | 1.21.52.1.8 |
Weakness: CWE-674 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H