CVE-2026-5170 is a denial-of-service vulnerability affecting specific versions of MongoDB Server 8.2, 8.0, and 7.0. A low-privileged user with network access can trigger a mongod process crash during the narrow and unpredictable window when a replica set is promoted to a sharded cluster. This can lead to a denial of service by taking down the primary of the replica set. Rated Medium severity with a CVSS score of 5.3, exploitation is considered complex due to the specific timing required. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 7.0.0, < 7.0.31CPE matchmatch criteria | cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:* | ||
>= 8.0.0, < 8.0.18CPE matchmatch criteria | cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:* | ||
>= 8.2.0, < 8.2.2CPE matchmatch criteria | cpe:2.3:a:mongodb:mongodb:*:*:*:*:-:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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