Vulnerability details
CVE-2026-118383
MongoDB Server
Pre-authentication use-after-free in MongoDB Server replica set primary catch-up
CVSS 4.0
9.5Critical
Remedy
Versions not listed as affected in the CVE record:
- MongoDB Server — version 9.0.7 and later
- MongoDB Server — version 8.3.16 and later
- MongoDB Server — version 8.0.37 and later
- MongoDB Server — version 7.0.48 and later
- MongoDB Server — version 6.0.30 and later
- MongoDB Server — version 5.0.35 and later
Official description
A use-after-free in the replication component of MongoDB Server can occur when a newly elected replica set primary completes catch-up. The condition can be caused by requests that do not require authentication, and may result in the server terminating unexpectedly or, under certain conditions, arbitrary code execution in the context of the server process. Replica set members are affected, including the shard and config server replica set members of sharded clusters; standalone mongod instances are not.
Related news
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.5Critical | 4.0 | CVEProject cvelistV5 (CNA) (mongodb) | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H |
| 9.0Critical | 3.1 | CVEProject cvelistV5 (CNA) (mongodb) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| MongoDB | MongoDB Server | 4.4.0 ≤ v < 4.4.32 | CVEProject cvelistV5 (CNA) |
| MongoDB | MongoDB Server | 5.0.0 ≤ v < 5.0.35 | CVEProject cvelistV5 (CNA) |
| MongoDB | MongoDB Server | 6.0.0 ≤ v < 6.0.30 | CVEProject cvelistV5 (CNA) |
| MongoDB | MongoDB Server | 7.0.0 ≤ v < 7.0.48 | CVEProject cvelistV5 (CNA) |
| MongoDB | MongoDB Server | 8.0.0 ≤ v < 8.0.37 | CVEProject cvelistV5 (CNA) |
| MongoDB | MongoDB Server | 8.3.0 ≤ v < 8.3.16 | CVEProject cvelistV5 (CNA) |
| MongoDB | MongoDB Server | 9.0.0 ≤ v < 9.0.7 | CVEProject cvelistV5 (CNA) |
References and advisories
2
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Details
- Published
- 2026-11-10
- Last updated
- 2026-11-10
- State
- Published
- Assigner (CNA)
- mongodb
- Kolun priority
- 28 · Low
Exploit prediction (EPSS)
0.71%
Probability of exploitation in 30 days
54.1%
Percentile (among all CVEs)
Weaknesses (CWE)
- CWE-416Use After Free