{"id":"CVE-2024-52304","aliases":["GHSA-8495-4g3g-x7pr","PYSEC-2026-1103"],"title":"aiohttp allows request smuggling due to incorrect parsing of chunk extensions","summary":"aiohttp allows request smuggling due to incorrect parsing of chunk extensions","severity":"medium","vendor":"aiohttp","product":"aiohttp","ecosystem":"pip","affected":["aiohttp < 3.10.11"],"patched":["aiohttp 3.10.11"],"published":"2024-11-18","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:50:20.487002605Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-8495-4g3g-x7pr","references":[{"url":"https://github.com/aio-libs/aiohttp/security/advisories/GHSA-8495-4g3g-x7pr"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2024-52304"},{"url":"https://github.com/aio-libs/aiohttp/commit/259edc369075de63e6f3a4eaade058c62af0df71"},{"url":"https://github.com/aio-libs/aiohttp"},{"url":"https://lists.debian.org/debian-lts-announce/2025/02/msg00002.html"}],"tags":["osv","pip"],"epss":0.00563,"epssPercentile":0.45621,"ingestedAt":"2026-07-08T18:25:47.293Z","slug":"CVE-2024-52304","body":"## Overview\n\n### Summary\nThe Python parser parses newlines in chunk extensions incorrectly which can lead to request smuggling vulnerabilities under certain conditions.\n\n### Impact\nIf a pure Python version of aiohttp is installed (i.e. without the usual C extensions) or `AIOHTTP_NO_EXTENSIONS` is enabled, then an attacker may be able to execute a request smuggling attack to bypass certain firewalls or proxy protections.\n\n-----\n\nPatch: https://github.com/aio-libs/aiohttp/commit/259edc369075de63e6f3a4eaade058c62af0df71\n\n## Affected packages\n\n- `aiohttp < 3.10.11`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `aiohttp 3.10.11`","depth":"sunlit","depthScore":28,"depthScoreParts":{"impact":27.5,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}