High (7.5). EPSS 6.4% chance of exploitation in the next 30 days. Fixed in bson 3.0.4.
The Moped::BSON::ObjecId.legal? method in mongodb/bson-ruby before 3.0.4 as used in rubygem-moped allows remote attackers to cause a denial of service (worker resource consumption) via a crafted string. NOTE: This issue is due to an incomplete fix to CVE-2015-4410.
Severity
CVSS 3.1
7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
6.4% chance of exploitation in the next 30 days; higher than 93% of CVEs (scores of 2026-10-31)