{"id":"USN-8344-3","summary":"python-pip vulnerability","details":"USN-8344-1 introduced a regression in pip. This update provides a complete fix for this issue..\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that pip's bundled urllib3 library improperly\n handled streaming decompression of highly compressed data. A remote\n attacker could possibly use this issue to cause pip to consume excessive resources,\n leading to a denial of service. (CVE-2025-66471)","modified":"2026-06-03T22:18:11.026464756Z","published":"2026-06-03T09:16:40Z","related":["UBUNTU-CVE-2025-66471"],"upstream":["CVE-2025-66471","UBUNTU-CVE-2025-66471"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8344-3"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-66471"}],"affected":[{"package":{"name":"python-pip","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"22.0.2+dfsg-1ubuntu0.7+esm3"}]}],"versions":["20.3.4-4","21.3.1+dfsg-3","22.0.2+dfsg-1","22.0.2+dfsg-1ubuntu0.1","22.0.2+dfsg-1ubuntu0.2","22.0.2+dfsg-1ubuntu0.3","22.0.2+dfsg-1ubuntu0.4","22.0.2+dfsg-1ubuntu0.5","22.0.2+dfsg-1ubuntu0.6","22.0.2+dfsg-1ubuntu0.7","22.0.2+dfsg-1ubuntu0.7+esm1","22.0.2+dfsg-1ubuntu0.7+esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"22.0.2+dfsg-1ubuntu0.7+esm3","binary_name":"python3-pip"},{"binary_name":"python3-pip-whl","binary_version":"22.0.2+dfsg-1ubuntu0.7+esm3"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8344-3.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2025-66471"}],"ecosystem":"Ubuntu:Pro:22.04:LTS"}}},{"package":{"name":"python-pip","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"24.0+dfsg-1ubuntu1.3+esm3"}]}],"versions":["23.2+dfsg-1","23.3+dfsg-1","24.0+dfsg-1","24.0+dfsg-1ubuntu1","24.0+dfsg-1ubuntu1.1","24.0+dfsg-1ubuntu1.2","24.0+dfsg-1ubuntu1.3","24.0+dfsg-1ubuntu1.3+esm1","24.0+dfsg-1ubuntu1.3+esm2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"python3-pip","binary_version":"24.0+dfsg-1ubuntu1.3+esm3"},{"binary_name":"python3-pip-whl","binary_version":"24.0+dfsg-1ubuntu1.3+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8344-3.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2025-66471"}],"ecosystem":"Ubuntu:Pro:24.04:LTS"}}},{"package":{"name":"python-pip","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"25.1.1+dfsg-1ubuntu2+esm3"}]}],"versions":["25.1.1+dfsg-1ubuntu2","25.1.1+dfsg-1ubuntu2+esm1","25.1.1+dfsg-1ubuntu2+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-pip","binary_version":"25.1.1+dfsg-1ubuntu2+esm3"},{"binary_version":"25.1.1+dfsg-1ubuntu2+esm3","binary_name":"python3-pip-whl"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8344-3.json","cves_map":{"cves":[{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2025-66471"}],"ecosystem":"Ubuntu:Pro:26.04:LTS"}}}],"schema_version":"1.7.5"}