Description
A user authorized to perform database queries may trigger denial of service by issuing specially crafted query contain a type of regex. This issue affects MongoDB Server v3.6 versions prior to 3.6.21 and MongoDB Server v4.0 versions prior to 4.0.20.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| MongoDB | MongoDB Server | 3.6 – < 3.6.21, 4.0 – < 4.0.20 | 3.6.21 |
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 | — |
Advisories 2
- ICSA-26-218-01 ABB Ability Zenon CISA ICS & IT advisories · Aug 6, 2026
- 9AKK108472A9037 ABB AbilityTM zenon Security Risk Due to End-of-Life MongoDB Component ABB PSIRT · Jul 30, 2026