CVE-2026-106436
mediumThe BSON encoder in the MongoDB PHP Driver does not check some return values after a document exceeds libbson's size limit.
Vendor / product: 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.
CVSS
6.5
6.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-10-08 20:17
Modified: 2026-10-13 20:13
NVD status: Analyzed
Last synced 3 days ago
Verified against the source API 2026-10-27 06:58 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
mongodb / php_driver ≥1.3.0 <1.21.1, ≥2.0.0 <2.1.11, ≥2.2.0 <2.5.4
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://jira.mongodb.org/browse/PHPC-2739
References
- https://jira.mongodb.org/browse/PHPC-2739 cna@mongodb.com
Data sources
NVD CVE API 2.0 — fetched 2026-10-27 06:58 UTC · record ↗