{"id":"CVE-2025-69229","summary":"AIOHTTP vulnerable to DoS through chunked messages","details":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. In versions 3.13.2 and below, handling of chunked messages can result in excessive blocking CPU usage when receiving a large number of chunks. If an application makes use of the request.read() method in an endpoint, it may be possible for an attacker to cause the server to spend a moderate amount of blocking CPU time (e.g. 1 second) while processing the request. This could potentially lead to DoS as the server would be unable to handle other requests during that time. This issue is fixed in version 3.13.3.","aliases":["GHSA-g84x-mcqj-x9qq"],"modified":"2026-04-08T04:22:16.023210Z","published":"2026-01-05T23:37:52.955Z","related":["CGA-fxwq-49gq-9wrw","SUSE-SU-2026:0858-1","SUSE-SU-2026:0859-1","SUSE-SU-2026:20425-1","openSUSE-SU-2026:10025-1","openSUSE-SU-2026:20204-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/69xxx/CVE-2025-69229.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-770"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/69xxx/CVE-2025-69229.json"},{"type":"ADVISORY","url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-g84x-mcqj-x9qq"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-69229"},{"type":"FIX","url":"https://github.com/aio-libs/aiohttp/commit/4ed97a4e46eaf61bd0f05063245f613469700229"},{"type":"FIX","url":"https://github.com/aio-libs/aiohttp/commit/dc3170b56904bdf814228fae70a5501a42a6c712"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/aio-libs/aiohttp","events":[{"introduced":"0"},{"fixed":"41f01ed680b7efc8f97677df45731b80328aad6c"},{"fixed":"4ed97a4e46eaf61bd0f05063245f613469700229"},{"fixed":"dc3170b56904bdf814228fae70a5501a42a6c712"}],"database_specific":{"versions":[{"introduced":"0"},{"fixed":"3.13.3"}]}}],"versions":["0.15.2","0.8.2","1.3.0","2.0.0","2.0.0rc1","4v0.21.6","v.0.6.5","v0.1","v0.10.0","v0.10.1","v0.11.0","v0.12.0","v0.13.0","v0.13.1","v0.14.0","v0.14.1","v0.14.2","v0.14.3","v0.14.4","v0.15.0","v0.15.1","v0.15.2","v0.15.3","v0.16.0","v0.16.1","v0.16.2","v0.16.3","v0.17.0","v0.18.0","v0.19.0","v0.2","v0.20.0","v0.20.1","v0.21.0","v0.22.0","v0.22.0b0","v0.22.0b1","v0.22.0b2","v0.22.0b3","v0.22.0b4","v0.22.0b5","v0.22.0b6","v0.22.1","v0.3","v0.4","v0.4.1","v0.4.2","v0.5.0","v0.6.1","v0.6.2","v0.6.3","v0.6.4","v0.7.0","v0.7.1","v0.7.2","v0.7.3","v0.8.0","v0.8.1","v0.8.3","v0.8.4","v0.9.0","v0.9.1","v0.9.2","v1.0.0","v1.0.1","v1.1.0","v1.1.1","v1.2.0","v2.1.0","v2.2.0","v2.3.0","v2.3.0a1","v2.3.0a2","v2.3.0a3","v2.3.0a4","v3.0.0b0","v3.0.0b1","v3.0.0b2","v3.0.0b3","v3.0.0b4","v3.1.0","v3.10.0","v3.10.0b0","v3.10.0b1","v3.10.0rc0","v3.11.0","v3.11.0b0","v3.11.0b1","v3.11.0b2","v3.11.0b3","v3.11.0b4","v3.11.0b5","v3.11.0rc0","v3.11.0rc1","v3.11.0rc2","v3.12.0","v3.12.0b0","v3.12.0b1","v3.12.0b2","v3.12.0b3","v3.12.0rc0","v3.12.0rc1","v3.13.0","v3.13.1","v3.13.2","v3.2.0","v3.4.0","v3.4.0a0","v3.4.0a3","v3.4.0b1","v3.4.0b2","v3.5.0","v3.5.0a1","v3.5.0b1","v3.5.0b2","v3.5.0b3","v3.5.1","v3.5.2","v3.5.3","v3.5.4","v3.6.0","v3.6.0a0","v3.6.0a1","v3.6.0a10","v3.6.0a11","v3.6.0a12","v3.6.0a2","v3.6.0a3","v3.6.0a4","v3.6.0a5","v3.6.0a6","v3.6.0a7","v3.6.0a8","v3.6.0a9","v3.6.0b0","v3.6.1","v3.6.1b3","v3.6.1b4","v3.6.2","v3.6.2a1","v3.6.2a2","v3.7.0","v3.7.0b0","v3.7.0b1","v3.7.1","v3.8.0","v3.9.0","v3.9.0b0","v3.9.0b1","v3.9.0rc0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-69229.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U"}]}