NULL pointer dereference in MongoDB
CVE-2026-82055
A security issue exists in MongoDB's 2dsphere index key generation that can cause a server crash due to a null pointer dereference. When a specially crafted GeoJSON document is inserted into a collection with a 2dsphere index, an inconsistency in geometry parsing can leave an internal object in an invalid, partially initialized state. During subsequent index key generation, access to this improperly initialized object results in a null pointer dereference that terminates the mongod process. An authenticated user with write access can use this to cause a denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 33.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
Weakness classification (CWE)
References
- jira.mongodb.org/browse/SERVER-130202 (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-82055?
- CVE-2026-82055 is a medium-severity vulnerability in MongoDB, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2026-09-08.
- How severe is CVE-2026-82055?
- Medium severity. CVSS v3 base score is 6.5 out of 10.