{"id":"UBUNTU-CVE-2026-44432","details":"urllib3 is an HTTP client library for Python. From 2.6.0 to before 2.7.0, urllib3 could decompress the whole response instead of the requested portion (1) during the second HTTPResponse.read(amt=N) call when the response was decompressed using the official Brotli library or (2) when HTTPResponse.drain_conn() was called after the response had been read and decompressed partially (compression algorithm did not matter here). These issues could cause urllib3 to fully decode a small amount of highly compressed data in a single operation. This could result in excessive resource consumption (high CPU usage and massive memory allocation for the decompressed data) on the client side. This vulnerability is fixed in 2.7.0.","modified":"2026-05-29T22:00:09.493758478Z","published":"2026-05-13T16:16:00Z","upstream":["CVE-2026-44432"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-44432"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-44432"},{"type":"REPORT","url":"https://github.com/urllib3/urllib3/security/advisories/GHSA-mf9v-mfxr-j63j"}],"affected":[{"package":{"name":"python-pip","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/python-pip?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1-2","1.5.4-1","1.5.4-1ubuntu1","1.5.4-1ubuntu3","1.5.4-1ubuntu4","1.5.4-1ubuntu4+esm1","1.5.4-1ubuntu4+esm2","1.5.4-1ubuntu4+esm3","1.5.4-1ubuntu4+esm4","1.5.4-1ubuntu4+esm5"],"ecosystem_specific":{"binaries":[{"binary_version":"1.5.4-1ubuntu4+esm5","binary_name":"python-pip"},{"binary_version":"1.5.4-1ubuntu4+esm5","binary_name":"python-pip-whl"},{"binary_version":"1.5.4-1ubuntu4+esm5","binary_name":"python3-pip"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44432.json"}},{"package":{"name":"python-pip","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.6-7ubuntu1","1.5.6-7ubuntu2","8.0.2-7","8.0.3-1","8.0.3-2","8.1.0-1","8.1.0-2","8.1.1-1","8.1.1-2","8.1.1-2ubuntu0.1","8.1.1-2ubuntu0.2","8.1.1-2ubuntu0.4","8.1.1-2ubuntu0.6","8.1.1-2ubuntu0.6+esm2","8.1.1-2ubuntu0.6+esm3","8.1.1-2ubuntu0.6+esm4","8.1.1-2ubuntu0.6+esm5","8.1.1-2ubuntu0.6+esm6","8.1.1-2ubuntu0.6+esm8","8.1.1-2ubuntu0.6+esm10","8.1.1-2ubuntu0.6+esm11","8.1.1-2ubuntu0.6+esm12"],"ecosystem_specific":{"binaries":[{"binary_name":"python-pip","binary_version":"8.1.1-2ubuntu0.6+esm12"},{"binary_version":"8.1.1-2ubuntu0.6+esm12","binary_name":"python-pip-whl"},{"binary_name":"python3-pip","binary_version":"8.1.1-2ubuntu0.6+esm12"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44432.json"}},{"package":{"name":"python-pip","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["9.0.1-2","9.0.1-2.3~ubuntu1","9.0.1-2.3~ubuntu1.18.04.1","9.0.1-2.3~ubuntu1.18.04.2","9.0.1-2.3~ubuntu1.18.04.3","9.0.1-2.3~ubuntu1.18.04.4","9.0.1-2.3~ubuntu1.18.04.5","9.0.1-2.3~ubuntu1.18.04.5+esm2","9.0.1-2.3~ubuntu1.18.04.5+esm3","9.0.1-2.3~ubuntu1.18.04.6","9.0.1-2.3~ubuntu1.18.04.6+esm1","9.0.1-2.3~ubuntu1.18.04.7","9.0.1-2.3~ubuntu1.18.04.7+esm1","9.0.1-2.3~ubuntu1.18.04.8","9.0.1-2.3~ubuntu1.18.04.8+esm1","9.0.1-2.3~ubuntu1.18.04.8+esm2","9.0.1-2.3~ubuntu1.18.04.8+esm4","9.0.1-2.3~ubuntu1.18.04.8+esm6","9.0.1-2.3~ubuntu1.18.04.8+esm7","9.0.1-2.3~ubuntu1.18.04.8+esm8"],"ecosystem_specific":{"binaries":[{"binary_version":"9.0.1-2.3~ubuntu1.18.04.8+esm8","binary_name":"python-pip"},{"binary_version":"9.0.1-2.3~ubuntu1.18.04.8+esm8","binary_name":"python-pip-whl"},{"binary_version":"9.0.1-2.3~ubuntu1.18.04.8+esm8","binary_name":"python3-pip"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44432.json"}},{"package":{"name":"python-pip","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/python-pip?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["18.1-5","18.1-5build1","18.1-5ubuntu1","20.0.2-2","20.0.2-4","20.0.2-5","20.0.2-5ubuntu1","20.0.2-5ubuntu1.1","20.0.2-5ubuntu1.3","20.0.2-5ubuntu1.4","20.0.2-5ubuntu1.5","20.0.2-5ubuntu1.6","20.0.2-5ubuntu1.7","20.0.2-5ubuntu1.8","20.0.2-5ubuntu1.9","20.0.2-5ubuntu1.10","20.0.2-5ubuntu1.10+esm2","20.0.2-5ubuntu1.11","20.0.2-5ubuntu1.11+esm2","20.0.2-5ubuntu1.11+esm3","20.0.2-5ubuntu1.11+esm4"],"ecosystem_specific":{"binaries":[{"binary_name":"python-pip-whl","binary_version":"20.0.2-5ubuntu1.11+esm4"},{"binary_version":"20.0.2-5ubuntu1.11+esm4","binary_name":"python3-pip"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44432.json"}},{"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"}]}],"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+esm2","binary_name":"python3-pip"},{"binary_name":"python3-pip-whl","binary_version":"22.0.2+dfsg-1ubuntu0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