{"id":"UBUNTU-CVE-2026-43504","details":"An issue was discovered in Prosody before 0.12.6 and 1.0.0 through 13.0.0 before 13.0.5, when mod_proxy65 is enabled. Because mod_proxy65 mishandles access control in a paused scenario, relaying of unauthenticated traffic can occur.","modified":"2026-05-20T16:26:02.570403398Z","published":"2026-05-01T15:16:00Z","upstream":["CVE-2026-43504"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43504"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-43504"},{"type":"REPORT","url":"https://prosody.im/security/advisory_735dd9d3/"},{"type":"REPORT","url":"https://hg.prosody.im/trunk/rev/4bbb17445ed9"}],"affected":[{"package":{"name":"prosody","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/prosody?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.8-1","0.9.9-1","0.9.10-1"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"0.9.10-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43504.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/prosody?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.9.12-2","0.10.0-1","0.10.0-1build1","0.10.0-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"0.10.0-1ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43504.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/prosody?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.11.2-1","0.11.3-1","0.11.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"0.11.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43504.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/prosody?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.11.10-1","0.11.10-1build1","0.11.10-1build2","0.11.11-1","0.11.11-2","0.11.12-1","0.11.13-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.11.13-1","binary_name":"prosody"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43504.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/prosody?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.3-1","0.12.4-1","0.12.4-1build1","0.12.4-1build2","0.12.4-1build3"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"0.12.4-1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43504.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/prosody?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.12.5-1build1","13.0.1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"13.0.1-1","binary_name":"prosody"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43504.json"}},{"package":{"name":"prosody","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/prosody?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["13.0.1-1","13.0.2-1","13.0.2-1build1","13.0.3-1","13.0.4-1","13.0.4-2"],"ecosystem_specific":{"binaries":[{"binary_name":"prosody","binary_version":"13.0.4-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-43504.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L"},{"type":"Ubuntu","score":"medium"}]}