{"cve":"CVE-2020-9490","nvd":{"published":"2020-08-07T16:15:12.043","modified":"2026-06-17T03:28:03.130","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-444"],"references":["http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00068.html","http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00071.html","http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00081.html","http://packetstormsecurity.com/files/160392/Apache-2.4.43-mod_http2-Memory-Corruption.html","https://httpd.apache.org/security/vulnerabilities_24.html#CVE-2020-9490"],"products":["apache:http_server","canonical:ubuntu_linux","debian:debian_linux","fedoraproject:fedora","opensuse:leap","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","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","redhat:openstack","redhat:openstack_for_ibm_power","redhat:software_collections"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-9490","score":0.88844,"percentile":0.99777,"date":"2026-10-31"},"kev":null,"osv":[],"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."]}