{"cve":"CVE-2018-1000519","nvd":{"published":"2018-06-26T16:29:01.307","modified":"2026-06-17T01:32:49.800","status":"Analyzed","description":"aio-libs aiohttp-session contains a Session Fixation vulnerability in load_session function for RedisStorage (see: https://github.com/aio-libs/aiohttp-session/blob/master/aiohttp_session/redis_storage.py#L42) that can result in Session Hijacking. This attack appear to be exploitable via Any method that allows setting session cookies (?session=<>, or meta tags or script tags with Set-Cookie).","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","score":6.5},"cwes":["CWE-384"],"references":["https://github.com/aio-libs/aiohttp-session/blob/master/aiohttp_session/redis_storage.py#L60","https://github.com/aio-libs/aiohttp-session/issues/272","https://github.com/aio-libs/aiohttp-session/blob/master/aiohttp_session/redis_storage.py#L60","https://github.com/aio-libs/aiohttp-session/issues/272"],"products":["aio-libs:aiohttp_session"],"source":"nvd","synced_at":"2026-10-19T20:51:47.459859389+00:00"},"epss":{"cve":"CVE-2018-1000519","score":0.01175,"percentile":0.67574,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-fpwp-69xv-c67f","url":"https://osv.dev/vulnerability/GHSA-fpwp-69xv-c67f","summary":"aiohttp-session Session Fixation vulnerability","modified":"2025-07-11T23:32:28.429947Z","packages":[{"ecosystem":"PyPI","name":"aiohttp-session","purl":"pkg:pypi/aiohttp-session","ranges":["<2.4.0"],"fixed":["2.4.0"]}]},{"id":"PYSEC-2018-80","url":"https://osv.dev/vulnerability/PYSEC-2018-80","summary":"","modified":"2023-11-08T03:59:38.712396Z","packages":[{"ecosystem":"PyPI","name":"aiohttp-session","purl":"pkg:pypi/aiohttp-session","ranges":["<2.4.0"],"fixed":["2.4.0"]}]}],"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."]}