{"id":"CVE-2020-17527","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-17527","generatedAt":"2026-10-27T22:33:07.149Z","title":"While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.","description":"While investigating bug 64830 it was discovered that Apache Tomcat 10.0.0-M1 to 10.0.0-M9, 9.0.0-M1 to 9.0.39 and 8.5.0 to 8.5.59 could re-use an HTTP request header value from the previous stream received on an HTTP/2 connection for the request associated with the subsequent stream. While this would most likely lead to an error and the closure of the HTTP/2 connection, it is possible that information could leak between requests.","published":"2020-12-03T19:15:12.000Z","lastModified":"2026-10-08T22:16:58.000Z","status":"Modified","sourceIdentifier":"security@apache.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:H/I:N/A:N"},"cwe":["CWE-200"],"affected":["apache/tomcat","netapp/element plug-in","netapp/oncommand system manager","debian/debian linux","oracle/blockchain platform","oracle/communications cloud native core binding support function","oracle/communications cloud native core policy","oracle/communications instant messaging server","oracle/instantis enterprisetrack","oracle/mysql enterprise monitor","oracle/sd-wan edge","oracle/workload manager"],"epss":{"score":0.24622,"percentile":0.97869,"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":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 24.6%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://www.openwall.com/lists/oss-security/2020/12/03/3","tags":["Mailing List","Third Party 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