{"id":"UBUNTU-CVE-2026-13608","details":"A flaw in the libcurl SASL negotiation for LDAP authentication allows an incomplete handshake sequence to be misinterpreted as a successful cryptographic verification. An attacker executing a Man-in-the-Middle (MITM) attack can inject a premature or shortcut response that bypasses complete peer validation.","modified":"2026-09-16T11:31:13Z","published":"2026-09-06T18:17:00Z","upstream":["CVE-2026-13608"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13608"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-13608"},{"type":"REPORT","url":"https://curl.se/docs/CVE-2026-13608.html"},{"type":"REPORT","url":"https://github.com/curl/curl/pull/22213/changes/1a00e2a73675c9521d214aafd6c02b553bfeb022"}],"affected":[{"package":{"name":"curl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/curl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.2.1-1ubuntu3","8.2.1-1ubuntu3.1","8.4.0-2ubuntu1","8.5.0-2ubuntu1","8.5.0-2ubuntu2","8.5.0-2ubuntu8","8.5.0-2ubuntu9","8.5.0-2ubuntu10","8.5.0-2ubuntu10.1","8.5.0-2ubuntu10.2","8.5.0-2ubuntu10.3","8.5.0-2ubuntu10.4","8.5.0-2ubuntu10.5","8.5.0-2ubuntu10.6","8.5.0-2ubuntu10.7","8.5.0-2ubuntu10.8","8.5.0-2ubuntu10.9","8.5.0-2ubuntu10.10","8.5.0-2ubuntu10.11","8.5.0-2ubuntu10.12","8.5.0-2ubuntu10.13"],"ecosystem_specific":{"binaries":[{"binary_name":"curl","binary_version":"8.5.0-2ubuntu10.13"},{"binary_version":"8.5.0-2ubuntu10.13","binary_name":"libcurl3t64-gnutls"},{"binary_name":"libcurl4t64","binary_version":"8.5.0-2ubuntu10.13"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13608.json"}},{"package":{"name":"curl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/curl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["8.14.1-2ubuntu1","8.17.0-1ubuntu1","8.18.0-1ubuntu1","8.18.0-1ubuntu2","8.18.0-1ubuntu2.1","8.18.0-1ubuntu2.2","8.18.0-1ubuntu2.3","8.18.0-1ubuntu2.4","8.18.0-1ubuntu2.5"],"ecosystem_specific":{"binaries":[{"binary_name":"curl","binary_version":"8.18.0-1ubuntu2.5"},{"binary_version":"8.18.0-1ubuntu2.5","binary_name":"libcurl3t64-gnutls"},{"binary_version":"8.18.0-1ubuntu2.5","binary_name":"libcurl4t64"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-13608.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}