{"id":"UBUNTU-CVE-2026-88035","details":"A size check in the client-side authentication path of the MongoDB C Driver can wrap around, so an unusually large user-name value is accepted and copied past the end of a small buffer. A party able to set the driver's connection settings may cause the application that embeds the driver to terminate unexpectedly. Reaching this code requires a build in which the optional external SASL authentication backend is present and a connection configured to use it.","modified":"2026-09-18T12:30:21.569198511Z","published":"2026-09-10T19:17:00Z","upstream":["CVE-2026-88035"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-88035"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-88035"}],"affected":[{"package":{"name":"mongodb","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/mongodb?arch=source&distro=esm-infra-legacy%2Ftrusty"},"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_version":"1:2.4.9-1ubuntu2+esm2","binary_name":"mongodb"},{"binary_name":"mongodb-clients","binary_version":"1:2.4.9-1ubuntu2+esm2"},{"binary_version":"1:2.4.9-1ubuntu2+esm2","binary_name":"mongodb-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88035.json"}},{"package":{"name":"mongodb","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/mongodb?arch=source&distro=esm-apps%2Fxenial"},"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_version":"1:2.6.10-0ubuntu1+esm2","binary_name":"mongodb-server"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-88035.json"}},{"package":{"name":"mongodb","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/mongodb?arch=source&distro=esm-apps%2Fbionic"},"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/2026/UBUNTU-CVE-2026-88035.json"}},{"package":{"name":"mongodb","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/mongodb?arch=source&distro=esm-apps%2Ffocal"},"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_version":"1:3.6.9+really3.6.8+90~g8e540c0b6d-0ubuntu5.3+esm1","binary_name":"mongodb"},{"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/2026/UBUNTU-CVE-2026-88035.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}