{"id":"UBUNTU-CVE-2026-69244","details":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.3, an out-of-bounds heap read could occur in the C response parser while building an error message for a malformed response. An attacker controlled server, or possibly an accidental response, could trigger a DoS in the client. The vulnerable path was error message construction in aiohttp/_http_parser.pyx, where an llhttp error-position pointer was used to build a snippet for malformed chunked responses and malformed request or response bytes at the buffer end. This issue is fixed in version 3.14.3.","modified":"2026-08-06T00:23:23Z","published":"2026-08-03T21:16:00Z","upstream":["CVE-2026-69244"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-69244"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-69244"},{"type":"REPORT","url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-cq5v-8q36-5273"},{"type":"REPORT","url":"https://github.com/aio-libs/aiohttp/pull/13223"},{"type":"REPORT","url":"https://github.com/aio-libs/aiohttp/commit/49f65d54150397892f7bcc4aae887767d51c322d"},{"type":"REPORT","url":"https://github.com/aio-libs/aiohttp/releases/tag/v3.14.3"}],"affected":[{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.17.2-1","0.17.4-1","0.17.4-1build1","0.20.2-1","0.20.2-1ubuntu0.1~esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.20.2-1ubuntu0.1~esm1","binary_name":"python3-aiohttp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-69244.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.2.3-1build1","2.2.3-2","2.3.6-1","3.0.1-1","3.0.1-1ubuntu0.1~esm1","3.0.1-1ubuntu0.1~esm4","3.0.1-1ubuntu0.1~esm5","3.0.1-1ubuntu0.1~esm6","3.0.1-1ubuntu0.1~esm7"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-aiohttp","binary_version":"3.0.1-1ubuntu0.1~esm7"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-69244.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.4-1","3.5.4-1build1","3.6.1-1","3.6.2-1","3.6.2-1build1","3.6.2-1ubuntu0.1~esm1","3.6.2-1ubuntu1","3.6.2-1ubuntu1+esm1","3.6.2-1ubuntu1+esm3","3.6.2-1ubuntu1+esm4","3.6.2-1ubuntu1+esm5","3.6.2-1ubuntu1+esm6"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-aiohttp","binary_version":"3.6.2-1ubuntu1+esm6"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-69244.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.4-1","3.7.4-1build2","3.8.1-3","3.8.1-4","3.8.1-4build1","3.8.1-4ubuntu0.2","3.8.1-4ubuntu0.2+esm1","3.8.1-4ubuntu0.2+esm2","3.8.1-4ubuntu0.2+esm3"],"ecosystem_specific":{"binaries":[{"binary_name":"python3-aiohttp","binary_version":"3.8.1-4ubuntu0.2+esm3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-69244.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8.4-1","3.9.1-1","3.9.1-1build1","3.9.1-1ubuntu0.1","3.9.1-1ubuntu0.1+esm1","3.9.1-1ubuntu0.1+esm2","3.9.1-1ubuntu0.1+esm3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.9.1-1ubuntu0.1+esm3","binary_name":"python3-aiohttp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-69244.json"}},{"package":{"name":"python-aiohttp","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/python-aiohttp?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.11.16-1","3.13.1-1","3.13.3-3","3.13.3-3ubuntu1","3.13.3-3ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.13.3-3ubuntu1+esm1","binary_name":"python3-aiohttp"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-69244.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}