{"schema_version":"1.9.0","id":"CVE-2025-49630","published":"2025-07-10T16:57:40.117Z","modified":"2026-08-12T03:51:14.439775350Z","aliases":["BIT-apache-2025-49630"],"related":["ALSA-2025:14625","ALSA-2025:14983","ALSA-2025:15123","SUSE-SU-2025:02565-1","SUSE-SU-2025:02682-1","SUSE-SU-2025:02683-1","SUSE-SU-2025:02684-1","SUSE-SU-2025:02685-1","SUSE-SU-2026:21846-1","SUSE-SU-2026:2686-1","openSUSE-SU-2025:15360-1","openSUSE-SU-2026:20810-1"],"summary":"Apache HTTP Server: mod_proxy_http2 denial of service","details":"In certain proxy configurations, a denial of service attack against Apache HTTP Server versions 2.4.26 through to 2.4.63 can be triggered by untrusted clients causing an assertion in mod_proxy_http2.\n\nConfigurations affected are a reverse proxy is configured for an HTTP/2 backend, with ProxyPreserveHost set to \"on\".","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/httpd","events":[{"introduced":"3cdd2d84507d2a86eb5dab2eec96f1035bb76d6c"},{"fixed":"7e926454793abd7d71b6afc8bd1ec1648752c6ad"}],"database_specific":{"cpe":"cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.4.26"},{"fixed":"2.4.64"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-49630.json"}}],"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/07/10/2"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2025/07/10/7"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/08/msg00009.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49630.json"},{"type":"ADVISORY","url":"https://httpd.apache.org/security/vulnerabilities_24.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-49630"}],"database_specific":{"cna_assigner":"apache","cwe_ids":["CWE-617"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/49xxx/CVE-2025-49630.json","unresolved_ranges":[{"extracted_events":[{"introduced":"2.4.26"},{"last_affected":"2.4.63"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"2.4.26"}],"source":"DESCRIPTION"}]},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}