--- cve: "CVE-2018-20852" severity: "LOW" cvss: 3.1 epss: "3.9%" vendor: "n/a" kev: false exploited: false published: "2019-07-13 21:15:10" tags: [cve, security, low] source: tsecurity.de CVE-Dossier exported: "2026-09-09T19:20:29+02:00" --- # CVE-2018-20852 > 3.1 LOW ## Beschreibung http.cookiejar.DefaultPolicy.domain_return_ok in Lib/http/cookiejar.py in Python before 3.7.3 does not correctly validate the domain: it can be tricked into sending existing cookies to the wrong server. An attacker may abuse this flaw by using a server with a hostname that has another valid hostname as a suffix (e.g., pythonicexample.com to steal cookies for example.com). When a program uses http.cookiejar.DefaultPolicy and tries to do an HTTP connection to an attacker-controlled server, existing cookies can be leaked to the attacker. This affects 2.x through 2.7.16, 3.x before 3.4.10, 3.5.x before 3.5.7, 3.6.x before 3.6.9, and 3.7.x before 3.7.3. ## Patch verfügbar (OSV) - e76cbc781044ee01b059f3702c580e66266b84c5 (Commit) - 1917d9b7c266d8be9ef1b403e38411ba871a0a37 (Commit) ## Referenzen - - - - - - - - - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2018-20852) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_