{"cve":"CVE-2024-30251","nvd":{"published":"2024-05-02T14:15:09.627","modified":"2026-06-17T07:26:36.337","status":"Modified","description":"aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In affected versions an attacker can send a specially crafted POST (multipart/form-data) request. When the aiohttp server processes it, the server will enter an infinite loop and be unable to process any further requests. An attacker can stop the application from serving requests after sending a single request. This issue has been addressed in version 3.9.4. Users are advised to upgrade. Users unable to upgrade may manually apply a patch to their systems. Please see the linked GHSA for instructions.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-835"],"references":["http://www.openwall.com/lists/oss-security/2024/05/02/4","https://github.com/aio-libs/aiohttp/commit/7eecdff163ccf029fbb1ddc9de4169d4aaeb6597","https://github.com/aio-libs/aiohttp/commit/cebe526b9c34dc3a3da9140409db63014bc4cf19","https://github.com/aio-libs/aiohttp/commit/f21c6f2ca512a026ce7f0f6c6311f62d6a638866","https://github.com/aio-libs/aiohttp/security/advisories/GHSA-5m98-qgg9-wh84"],"products":["aiohttp:aiohttp"],"source":"nvd","synced_at":"2026-10-19T21:49:08.435428910+00:00"},"epss":{"cve":"CVE-2024-30251","score":0.01094,"percentile":0.6551,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-5m98-qgg9-wh84","url":"https://osv.dev/vulnerability/GHSA-5m98-qgg9-wh84","summary":"aiohttp vulnerable to Denial of Service when trying to parse malformed POST requests","modified":"2026-09-10T03:50:13.407749365Z","packages":[{"ecosystem":"PyPI","name":"aiohttp","purl":"pkg:pypi/aiohttp","ranges":["<3.9.4"],"fixed":["3.9.4"]}]},{"id":"PYSEC-2026-1098","url":"https://osv.dev/vulnerability/PYSEC-2026-1098","summary":"aiohttp vulnerable to Denial of Service when trying to parse malformed POST requests","modified":"2026-07-07T17:46:25.596075903Z","packages":[{"ecosystem":"PyPI","name":"aiohttp","purl":"pkg:pypi/aiohttp","ranges":["<3.9.4"],"fixed":["3.9.4"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}