{"id":"UBUNTU-CVE-2021-32040","details":"It may be possible to have an extremely long aggregation pipeline in conjunction with a specific stage/operator and cause a stack overflow due to the size of the stack frames used by that stage. If an attacker could cause such an aggregation to occur, they could maliciously crash MongoDB in a DoS attack. This vulnerability affects MongoDB Server v4.4 versions prior to and including 4.4.28, MongoDB Server v5.0 versions prior to 5.0.4 and MongoDB Server v4.2 versions prior to 4.2.16. Workaround: \u003e= v4.2.16 users and all v4.4 users can add the --setParameter internalPipelineLengthLimit=50 instead of the default 1000 to mongod at startup to prevent a crash.","modified":"2026-04-22T14:44:58.177258Z","published":"2022-04-12T15:15:00Z","upstream":["CVE-2021-32040"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-32040"},{"type":"REPORT","url":"https://jira.mongodb.org/browse/SERVER-58203"},{"type":"REPORT","url":"https://jira.mongodb.org/browse/SERVER-59299"},{"type":"REPORT","url":"https://jira.mongodb.org/browse/SERVER-60218"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-32040"}],"affected":[{"package":{"name":"mongodb","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/mongodb@1:2.4.9-1ubuntu2+esm2?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:2.4.6-0ubuntu5","1:2.4.6-0ubuntu6","1:2.4.8-1ubuntu1","1:2.4.8-2","1:2.4.9-1","1:2.4.9-1ubuntu1","1:2.4.9-1ubuntu2","1:2.4.9-1ubuntu2+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"mongodb","binary_version":"1:2.4.9-1ubuntu2+esm2"},{"binary_name":"mongodb-clients","binary_version":"1:2.4.9-1ubuntu2+esm2"},{"binary_name":"mongodb-server","binary_version":"1:2.4.9-1ubuntu2+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32040.json"}},{"package":{"name":"mongodb","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/mongodb@1:2.6.10-0ubuntu1+esm2?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:2.6.10-0ubuntu1","1:2.6.10-0ubuntu1+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"mongodb","binary_version":"1:2.6.10-0ubuntu1+esm2"},{"binary_name":"mongodb-clients","binary_version":"1:2.6.10-0ubuntu1+esm2"},{"binary_name":"mongodb-server","binary_version":"1:2.6.10-0ubuntu1+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32040.json"}},{"package":{"name":"mongodb","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/mongodb@1:3.6.3-0ubuntu1.4+esm2?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.4.7-1","1:3.4.7-1ubuntu1","1:3.4.7-1ubuntu2","1:3.4.7-1ubuntu4","1:3.4.14-3ubuntu1","1:3.4.14-3ubuntu2","1:3.6.3-0ubuntu1","1:3.6.3-0ubuntu1.1","1:3.6.3-0ubuntu1.3","1:3.6.3-0ubuntu1.4","1:3.6.3-0ubuntu1.4+esm1","1:3.6.3-0ubuntu1.4+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"mongodb","binary_version":"1:3.6.3-0ubuntu1.4+esm2"},{"binary_name":"mongodb-clients","binary_version":"1:3.6.3-0ubuntu1.4+esm2"},{"binary_name":"mongodb-server","binary_version":"1:3.6.3-0ubuntu1.4+esm2"},{"binary_name":"mongodb-server-core","binary_version":"1:3.6.3-0ubuntu1.4+esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32040.json"}},{"package":{"name":"mongodb","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/mongodb@1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1?arch=source&distro=esm-apps/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu2","1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5","1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.2","1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3","1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"mongodb","binary_version":"1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1"},{"binary_name":"mongodb-clients","binary_version":"1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1"},{"binary_name":"mongodb-server","binary_version":"1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1"},{"binary_name":"mongodb-server-core","binary_version":"1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-32040.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}