{"id":"CVE-2020-9490","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-9490","generatedAt":"2026-11-05T02:02:39.247Z","title":"A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards.","description":"Apache HTTP Server versions 2.4.20 to 2.4.43. A specially crafted value for the 'Cache-Digest' header in a HTTP/2 request would result in a crash when the server actually tries to HTTP/2 PUSH a resource afterwards. Configuring the HTTP/2 feature via \"H2Push off\" will mitigate this vulnerability for unpatched servers.","published":"2020-08-07T16:15:12.000Z","lastModified":"2026-06-17T03:28:03.000Z","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:N/I:N/A:H"},"cwe":["CWE-444"],"affected":["apache/http server","oracle/communications element manager","oracle/communications session report manager","oracle/communications session route manager","oracle/enterprise manager ops center","oracle/hyperion infrastructure technology","oracle/instantis enterprisetrack","oracle/zfs storage appliance kit","opensuse/leap","debian/debian linux","fedoraproject/fedora","canonical/ubuntu linux","redhat/software collections","redhat/openstack","redhat/openstack for ibm power","redhat/enterprise linux","redhat/enterprise linux eus","redhat/enterprise linux for ibm z systems","redhat/enterprise linux for ibm z systems eus","redhat/enterprise linux for power little endian","redhat/enterprise linux for power little endian eus","redhat/enterprise linux server aus","redhat/enterprise linux server for power little endian update services for sap solutions","redhat/enterprise linux server tus","redhat/enterprise linux server update services for sap solutions"],"epss":{"score":0.88844,"percentile":0.99777,"date":"2026-11-03","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 88.8%, higher than 100% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html","tags":["Mailing List","Third Party Advisory"],"source":"security@apache.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00071.html","tags":["Mailing List","Third Party Advisory"],"source":"security@apache.org"},{"url":"http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00081.html","tags":["Mailing List","Third Party Advisory"],"source":"security@apache.org"},{"url":"http://packetstormsecurity.com/files/160392/Apache-2.4.43-mod_http2-Memory-Corruption.html","tags":["Third Party Advisory","VDB Entry"],"source":"security@apache.org"},{"url":"https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-9490","tags":["Vendor 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Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-9490","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."}