Critical (9.9) in MongoDB mongo-express. In CISA KEV since 2021-12-10. EPSS 85% chance of exploitation in the next 30 days. Fixed in mongo-express 0.54.0.
mongo-express before 0.54.0 is vulnerable to Remote Code Execution via endpoints that uses the `toBSON` method. A misuse of the `vm` dependency to perform `exec` commands in a non-safe environment.
Severity
CVSS 3.1
9.9 critical
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
EPSS
85% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)