{"cve":"CVE-2026-54274","nvd":{"published":"2026-06-22T18:16:45.877","modified":"2026-10-25T23:10:00.167","status":"Analyzed","description":"AIOHTTP is an asynchronous HTTP client/server framework for asyncio and Python. Prior to 3.14.1, if an attacker sends large incomplete websocket frame payloads, it may be possible to bypass the usual size limits on memory use. This vulnerability is fixed in 3.14.1.","cvss_v4":{"vector":"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","score":6.6},"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-770"],"references":["https://github.com/aio-libs/aiohttp/commit/14b6ee851fb16ec199acb950de0c82d476799e7d","https://github.com/aio-libs/aiohttp/security/advisories/GHSA-xcgm-r5h9-7989"],"products":["aiohttp:aiohttp"],"source":"nvd","synced_at":"2026-10-25T23:44:33.281319194+00:00"},"epss":{"cve":"CVE-2026-54274","score":0.00539,"percentile":0.45096,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-xcgm-r5h9-7989","url":"https://osv.dev/vulnerability/GHSA-xcgm-r5h9-7989","summary":"aiohttp: Incomplete websocket frame payloads bypass memory limits","modified":"2026-09-10T03:50:12.346397944Z","packages":[{"ecosystem":"PyPI","name":"aiohttp","purl":"pkg:pypi/aiohttp","ranges":["<3.14.1"],"fixed":["3.14.1"]}]},{"id":"PYSEC-2026-2108","url":"https://osv.dev/vulnerability/PYSEC-2026-2108","summary":"","modified":"2026-07-13T07:15:15.772445691Z","packages":[{"ecosystem":"PyPI","name":"aiohttp","purl":"pkg:pypi/aiohttp","ranges":["<3.14.1"],"fixed":["3.14.1"]}]}],"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."]}