{"id":"USN-8941-1","summary":"squid, squid3 vulnerabilities","details":"It was discovered that Squid incorrectly handled certain HTTP Transfer-\nEncoding headers. An attacker could possibly use this issue to perform HTTP\nrequest smuggling attacks, bypass security mechanisms, or poison web\ncaches.  (CVE-2026-61642)\n\nIt was discovered that Squid incorrectly handled certain cache digest\nreplies, which could lead to a buffer overflow. A remote attacker could\npossibly use this issue to cause Squid to crash, resulting in a denial of\nservice. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and\nUbuntu 20.04 LTS. (CVE-2026-50012)\n\nIt was discovered that Squid incorrectly handled parsing certain FTP\ndirectory listings. A remote attacker could possibly use this issue to\nobtain sensitive information. This issue only affected Ubuntu 16.04 LTS,\nUbuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-47729)\n\nIt was discovered that Squid incorrectly handled certain ICP traffic. A\nremote attacker could possibly use this issue to cause Squid to crash,\nresulting in a denial of service. This issue only affected Ubuntu 16.04\nLTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-32748,\nCVE-2026-33526)\n\nIt was discovered that Squid incorrectly handled certain ICP requests. A\nremote attacker could possibly use this issue to obtain sensitive\ninformation. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,\nand Ubuntu 20.04 LTS. (CVE-2026-33515)","modified":"2026-10-20T22:58:05.138938566Z","published":"2026-10-20T13:59:52Z","upstream":["CVE-2026-32748","CVE-2026-33515","CVE-2026-33526","CVE-2026-47729","CVE-2026-50012","CVE-2026-61642","UBUNTU-CVE-2026-32748","UBUNTU-CVE-2026-33515","UBUNTU-CVE-2026-33526","UBUNTU-CVE-2026-47729","UBUNTU-CVE-2026-50012","UBUNTU-CVE-2026-61642"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8941-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-32748"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33515"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-33526"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-47729"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-50012"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-61642"}],"affected":[{"package":{"name":"squid3","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/squid3?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.12-1ubuntu7.16+esm7"}]}],"versions":["3.3.8-1ubuntu16","3.3.8-1ubuntu17","3.5.12-1ubuntu6","3.5.12-1ubuntu7","3.5.12-1ubuntu7.1","3.5.12-1ubuntu7.2","3.5.12-1ubuntu7.3","3.5.12-1ubuntu7.4","3.5.12-1ubuntu7.5","3.5.12-1ubuntu7.6","3.5.12-1ubuntu7.7","3.5.12-1ubuntu7.8","3.5.12-1ubuntu7.9","3.5.12-1ubuntu7.10","3.5.12-1ubuntu7.11","3.5.12-1ubuntu7.12","3.5.12-1ubuntu7.13","3.5.12-1ubuntu7.14","3.5.12-1ubuntu7.15","3.5.12-1ubuntu7.16","3.5.12-1ubuntu7.16+esm1","3.5.12-1ubuntu7.16+esm2","3.5.12-1ubuntu7.16+esm3","3.5.12-1ubuntu7.16+esm4","3.5.12-1ubuntu7.16+esm5","3.5.12-1ubuntu7.16+esm6"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_version":"3.5.12-1ubuntu7.16+esm7","binary_name":"squid"},{"binary_name":"squid-cgi","binary_version":"3.5.12-1ubuntu7.16+esm7"},{"binary_version":"3.5.12-1ubuntu7.16+esm7","binary_name":"squid-common"},{"binary_version":"3.5.12-1ubuntu7.16+esm7","binary_name":"squid-purge"},{"binary_version":"3.5.12-1ubuntu7.16+esm7","binary_name":"squid3"},{"binary_name":"squidclient","binary_version":"3.5.12-1ubuntu7.16+esm7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8941-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[]}}},{"package":{"name":"squid3","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/squid3?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.27-1ubuntu1.14+esm6"}]}],"versions":["3.5.23-5ubuntu1","3.5.23-5ubuntu2","3.5.27-1ubuntu1","3.5.27-1ubuntu1.1","3.5.27-1ubuntu1.2","3.5.27-1ubuntu1.3","3.5.27-1ubuntu1.4","3.5.27-1ubuntu1.5","3.5.27-1ubuntu1.6","3.5.27-1ubuntu1.7","3.5.27-1ubuntu1.8","3.5.27-1ubuntu1.9","3.5.27-1ubuntu1.10","3.5.27-1ubuntu1.11","3.5.27-1ubuntu1.12","3.5.27-1ubuntu1.13","3.5.27-1ubuntu1.14","3.5.27-1ubuntu1.14+esm1","3.5.27-1ubuntu1.14+esm2","3.5.27-1ubuntu1.14+esm3","3.5.27-1ubuntu1.14+esm4","3.5.27-1ubuntu1.14+esm5"],"ecosystem_specific":{"binaries":[{"binary_version":"3.5.27-1ubuntu1.14+esm6","binary_name":"squid"},{"binary_name":"squid-cgi","binary_version":"3.5.27-1ubuntu1.14+esm6"},{"binary_version":"3.5.27-1ubuntu1.14+esm6","binary_name":"squid-common"},{"binary_name":"squid-purge","binary_version":"3.5.27-1ubuntu1.14+esm6"},{"binary_name":"squid3","binary_version":"3.5.27-1ubuntu1.14+esm6"},{"binary_version":"3.5.27-1ubuntu1.14+esm6","binary_name":"squidclient"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8941-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[]}}},{"package":{"name":"squid","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/squid?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.10-1ubuntu1.13+esm3"}]}],"versions":["4.8-1ubuntu2","4.8-1ubuntu3","4.9-2ubuntu1","4.9-2ubuntu2","4.9-2ubuntu3","4.9-2ubuntu4","4.10-1ubuntu1","4.10-1ubuntu1.1","4.10-1ubuntu1.2","4.10-1ubuntu1.3","4.10-1ubuntu1.4","4.10-1ubuntu1.5","4.10-1ubuntu1.6","4.10-1ubuntu1.7","4.10-1ubuntu1.8","4.10-1ubuntu1.9","4.10-1ubuntu1.10","4.10-1ubuntu1.11","4.10-1ubuntu1.12","4.10-1ubuntu1.13","4.10-1ubuntu1.13+esm1","4.10-1ubuntu1.13+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"squid","binary_version":"4.10-1ubuntu1.13+esm3"},{"binary_name":"squid-cgi","binary_version":"4.10-1ubuntu1.13+esm3"},{"binary_name":"squid-common","binary_version":"4.10-1ubuntu1.13+esm3"},{"binary_version":"4.10-1ubuntu1.13+esm3","binary_name":"squid-purge"},{"binary_name":"squidclient","binary_version":"4.10-1ubuntu1.13+esm3"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8941-1.json"}},{"package":{"name":"squid","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/squid?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.9-0ubuntu0.22.04.8"}]}],"versions":["4.13-10ubuntu5","5.2-1ubuntu1","5.2-1ubuntu3","5.2-1ubuntu4","5.2-1ubuntu4.1","5.2-1ubuntu4.2","5.2-1ubuntu4.3","5.7-0ubuntu0.22.04.1","5.7-0ubuntu0.22.04.2","5.7-0ubuntu0.22.04.3","5.7-0ubuntu0.22.04.4","5.9-0ubuntu0.22.04.1","5.9-0ubuntu0.22.04.2","5.9-0ubuntu0.22.04.3","5.9-0ubuntu0.22.04.4","5.9-0ubuntu0.22.04.5","5.9-0ubuntu0.22.04.7"],"ecosystem_specific":{"binaries":[{"binary_version":"5.9-0ubuntu0.22.04.8","binary_name":"squid"},{"binary_name":"squid-cgi","binary_version":"5.9-0ubuntu0.22.04.8"},{"binary_name":"squid-common","binary_version":"5.9-0ubuntu0.22.04.8"},{"binary_name":"squid-openssl","binary_version":"5.9-0ubuntu0.22.04.8"},{"binary_version":"5.9-0ubuntu0.22.04.8","binary_name":"squid-purge"},{"binary_name":"squidclient","binary_version":"5.9-0ubuntu0.22.04.8"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8941-1.json"}},{"package":{"name":"squid","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/squid?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.14-0ubuntu0.24.04.5"}]}],"versions":["6.1-2ubuntu1","6.1-2ubuntu2","6.5-1ubuntu1","6.5-1ubuntu2","6.5-1ubuntu3","6.6-1ubuntu4","6.6-1ubuntu5","6.6-1ubuntu5.1","6.10-0ubuntu0.24.04.1","6.13-0ubuntu0.24.04.1","6.13-0ubuntu0.24.04.2","6.13-0ubuntu0.24.04.3","6.14-0ubuntu0.24.04.1","6.14-0ubuntu0.24.04.2","6.14-0ubuntu0.24.04.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"squid","binary_version":"6.14-0ubuntu0.24.04.5"},{"binary_name":"squid-cgi","binary_version":"6.14-0ubuntu0.24.04.5"},{"binary_name":"squid-common","binary_version":"6.14-0ubuntu0.24.04.5"},{"binary_name":"squid-openssl","binary_version":"6.14-0ubuntu0.24.04.5"},{"binary_name":"squid-purge","binary_version":"6.14-0ubuntu0.24.04.5"},{"binary_name":"squidclient","binary_version":"6.14-0ubuntu0.24.04.5"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8941-1.json"}}],"schema_version":"1.9.0"}