{"id":"UBUNTU-CVE-2026-126775","details":"Social-auth-core 4.7.0 before 7.0.0 contains a login cross-site request forgery vulnerability in the SAML backend that restores sessions named in the unsigned RelayState parameter. Attackers can deliver their own valid IdP response and RelayState to a victim's browser via an auto-submitting form, signing the victim into the attacker's account to capture entered data.","modified":"2026-11-12T23:46:41.025434274Z","published":"2026-11-12T00:00:00Z","upstream":["CVE-2026-126775"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-126775"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-126775"},{"type":"REPORT","url":"https://github.com/python-social-auth/social-core/commit/7d9da571fc9ce8bd0003ccfcbfa8ed98c18bb640"},{"type":"REPORT","url":"https://github.com/python-social-auth/social-core/pull/2167"},{"type":"REPORT","url":"https://github.com/python-social-auth/social-core/releases/tag/7.0.0"},{"type":"REPORT","url":"https://github.com/python-social-auth/social-core/security/advisories/GHSA-4pv2-52v7-vrfx"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/social-auth-core-4.7.0-before-7.0.0-login-csrf-via-saml-relaystate"}],"affected":[{"package":{"name":"social-auth-core","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/social-auth-core?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-social-auth-core","binary_version":"3.1.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126775.json"}},{"package":{"name":"social-auth-core","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/social-auth-core?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.1.0-1.1","4.1.0-1","4.2.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"4.2.0-1","binary_name":"python3-social-auth-core"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126775.json"}},{"package":{"name":"social-auth-core","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/social-auth-core?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.2-2","4.5.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-social-auth-core","binary_version":"4.5.3-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126775.json"}},{"package":{"name":"social-auth-core","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/social-auth-core?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.8.3-1","5.0.2-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.0.2-1","binary_name":"python3-social-auth-core"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126775.json"}},{"package":{"name":"social-auth-core","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/social-auth-core?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.6.1-1","4.8.1-1","4.8.3-1"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-social-auth-core","binary_version":"4.8.3-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126775.json"}}],"schema_version":"1.9.2","severity":[{"type":"Ubuntu","score":"medium"}]}