Description
When OIDC authentication is enabled in configuration, clients may set specific values in the "mechanism" parameter of the "authenticate" command that lead to server crash. The authenticate command is accessible to unauthenticated clients, leading to pre-auth denial-of-service in affected product configurations.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MongoDB | MongoDB Server | 8.3.0 – < 8.3.3, 8.2.0 – < 8.2.10 | 8.3.3 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | mongodb | No fix yet | — |
| Ubuntu Pro 18.04 LTS | mongodb | No fix yet | — |
| Ubuntu Pro 16.04 LTS | mongodb | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | mongodb | No fix yet | — |
Advisories 2
- NCSC-2026-0209 Kwetsbaarheden verholpen in MongoDB Server NCSC-NL (Netherlands) · Jun 23, 2026
- WID-SEC-2026-1868 MongoDB: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 10, 2026