{"id":"CVE-2020-27978","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-27978","generatedAt":"2026-10-27T23:43:30.317Z","title":"Shibboleth Identify Provider 3.x before 3.4.6 has a denial of service flaw.","description":"Shibboleth Identify Provider 3.x before 3.4.6 has a denial of service flaw. A remote unauthenticated attacker can cause a login flow to trigger Java heap exhaustion due to the creation of objects in the Java Servlet container session.","published":"2020-10-28T15:15:14.000Z","lastModified":"2026-06-17T03:09:57.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-770"],"affected":["shibboleth/identity provider"],"epss":{"score":0.01855,"percentile":0.79029,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.85%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://shibboleth.net/community/advisories/secadv_20191002.txt","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://shibboleth.net/community/advisories/secadv_20191002.txt","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-27978","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}